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diff --git a/cli/tsc/dts/lib.esnext.array.d.ts b/cli/tsc/dts/lib.esnext.array.d.ts
new file mode 100644
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+++ b/cli/tsc/dts/lib.esnext.array.d.ts
@@ -0,0 +1,583 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+/// <reference no-default-lib="true"/>
+
+interface Array<T> {
+  /**
+   * Returns the value of the last element in the array where predicate is true, and undefined
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found, find
+   * immediately returns that element value. Otherwise, find returns undefined.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findLast<S extends T>(predicate: (this: void, value: T, index: number, obj: T[]) => value is S, thisArg?: any): S | undefined;
+  findLast(predicate: (value: T, index: number, obj: T[]) => unknown, thisArg?: any): T | undefined;
+
+  /**
+  * Returns the index of the last element in the array where predicate is true, and -1
+  * otherwise.
+  * @param predicate find calls predicate once for each element of the array, in ascending
+  * order, until it finds one where predicate returns true. If such an element is found,
+  * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+  * @param thisArg If provided, it will be used as the this value for each invocation of
+  * predicate. If it is not provided, undefined is used instead.
+  */
+   findLastIndex(predicate: (value: T, index: number, obj: T[]) => unknown, thisArg?: any): number;
+
+  /** Copies and reverses the elements in an array.*/
+  toReversed(): T[];
+
+  /**
+   * Copies and sorts an array.
+   * @param compareFn Function used to determine the order of the elements. It is expected to return
+   * a negative value if the first argument is less than the second argument, zero if they're equal, and a positive
+   * value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
+   * ```ts
+   * [11,2,22,1].sort((a, b) => a - b)
+   * ```
+   */
+  toSorted(compareFn?: (a: T, b: T) => number): T[];
+
+  /**
+   * Copies and elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
+   * @param start The zero-based location in the array from which to start removing elements.
+   * @param deleteCount The number of elements to remove.
+   * @returns An array containing the elements that were deleted.
+   */
+  toSpliced(start: number, deleteCount?: number): T[];
+  /**
+   * Copies and removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
+   * @param start The zero-based location in the array from which to start removing elements.
+   * @param deleteCount The number of elements to remove.
+   * @param items Elements to insert into the array in place of the deleted elements.
+   * @returns An array containing the elements that were deleted.
+   */
+  toSpliced<F>(start: number, deleteCount: number, ...items: F[]): (F | T)[];
+
+  /**
+   * Copies and replaces the element at the given index with the provided value.
+   * @param index The zero-based location in the array for which to replace an element.
+   * @param value Element to insert into the array in place of the replaced element.
+   */
+  with<F>(index: number, value: F): (F | T)[];
+ }
+
+interface ReadonlyArray<T> {
+  /**
+   * Returns the value of the last element in the array where predicate is true, and undefined
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found, find
+   * immediately returns that element value. Otherwise, find returns undefined.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findLast<S extends T>(predicate: (this: void, value: T, index: number, obj: T[]) => value is S, thisArg?: any): S | undefined;
+  findLast(predicate: (value: T, index: number, obj: T[]) => unknown, thisArg?: any): T | undefined;
+
+   /**
+   * Returns the index of the last element in the array where predicate is true, and -1
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found,
+   * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findLastIndex(predicate: (value: T, index: number, obj: T[]) => unknown, thisArg?: any): number;
+
+  /** Copies and reverses the elements in an array.*/
+  toReversed(): T[];
+
+  /**
+   * Copies and sorts an array.
+   * @param compareFn Function used to determine the order of the elements. It is expected to return
+   * a negative value if the first argument is less than the second argument, zero if they're equal, and a positive
+   * value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
+   * ```ts
+   * [11,2,22,1].sort((a, b) => a - b)
+   * ```
+   */
+  toSorted(compareFn?: (a: T, b: T) => number): T[];
+
+  /**
+   * Copies and elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
+   * @param start The zero-based location in the array from which to start removing elements.
+   * @param deleteCount The number of elements to remove.
+   * @returns An array containing the elements that were deleted.
+   */
+  toSpliced(start: number, deleteCount?: number): T[];
+  /**
+   * Copies and removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
+   * @param start The zero-based location in the array from which to start removing elements.
+   * @param deleteCount The number of elements to remove.
+   * @param items Elements to insert into the array in place of the deleted elements.
+   * @returns An array containing the elements that were deleted.
+   */
+  toSpliced<F>(start: number, deleteCount: number, ...items: F[]): (F | T)[];
+
+  /**
+   * Copies and replaces the element at the given index with the provided value.
+   * @param index The zero-based location in the array for which to replace an element.
+   * @param value Element to insert into the array in place of the replaced element.
+   */
+  with<F>(index: number, value: F): (F | T)[];
+}
+
+interface Int8Array {
+  /**
+   * Returns the value of the last element in the array where predicate is true, and undefined
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found, find
+   * immediately returns that element value. Otherwise, find returns undefined.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findLast(predicate: (value: number, index: number, obj: Int8Array) => boolean, thisArg?: any): number | undefined;
+
+  /**
+   * Returns the index of the last element in the array where predicate is true, and -1
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found,
+   * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findLastIndex(predicate: (value: number, index: number, obj: Int8Array) => boolean, thisArg?: any): number;
+
+  /** Copies and reverses the elements in an array.*/
+  toReversed(): Int8Array;
+
+  /**
+   * Copies and sorts an array.
+   * @param compareFn Function used to determine the order of the elements. It is expected to return
+   * a negative value if first argument is less than second argument, zero if they're equal and a positive
+   * value otherwise. If omitted, the elements are sorted in ascending order.
+   * ```ts
+   * [11,2,22,1].sort((a, b) => a - b)
+   * ```
+   */
+  toSorted(compareFn?: (a: number, b: number) => number): Int8Array;
+
+  with(index: number, value: number): Int8Array;
+}
+
+interface Uint8Array {
+  /**
+   * Returns the value of the last element in the array where predicate is true, and undefined
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found, find
+   * immediately returns that element value. Otherwise, find returns undefined.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findLast(predicate: (value: number, index: number, obj: Uint8Array) => boolean, thisArg?: any): number | undefined;
+
+  /**
+   * Returns the index of the last element in the array where predicate is true, and -1
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found,
+   * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findLastIndex(predicate: (value: number, index: number, obj: Uint8Array) => boolean, thisArg?: any): number;
+
+  /** Copies and reverses the elements in an array.*/
+  toReversed(): Uint8Array;
+
+  /**
+   * Copies and sorts an array.
+   * @param compareFn Function used to determine the order of the elements. It is expected to return
+   * a negative value if first argument is less than second argument, zero if they're equal and a positive
+   * value otherwise. If omitted, the elements are sorted in ascending order.
+   * ```ts
+   * [11,2,22,1].sort((a, b) => a - b)
+   * ```
+   */
+  toSorted(compareFn?: (a: number, b: number) => number): Uint8Array;
+
+  with(index: number, value: number): Uint8Array;
+}
+
+interface Uint8ClampedArray {
+  /**
+   * Returns the value of the last element in the array where predicate is true, and undefined
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found, find
+   * immediately returns that element value. Otherwise, find returns undefined.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findLast(predicate: (value: number, index: number, obj: Uint8ClampedArray) => boolean, thisArg?: any): number | undefined;
+
+  /**
+   * Returns the index of the last element in the array where predicate is true, and -1
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found,
+   * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findIndexLast(predicate: (value: number, index: number, obj: Uint8ClampedArray) => boolean, thisArg?: any): number;
+
+  /** Copies and reverses the elements in an array.*/
+  toReversed(): Uint8ClampedArray;
+
+  /**
+   * Copies and sorts an array.
+   * @param compareFn Function used to determine the order of the elements. It is expected to return
+   * a negative value if first argument is less than second argument, zero if they're equal and a positive
+   * value otherwise. If omitted, the elements are sorted in ascending order.
+   * ```ts
+   * [11,2,22,1].sort((a, b) => a - b)
+   * ```
+   */
+  toSorted(compareFn?: (a: number, b: number) => number): Uint8ClampedArray;
+
+  with(index: number, value: number): Uint8ClampedArray;
+}
+
+
+interface Int16Array {
+  /**
+   * Returns the value of the last element in the array where predicate is true, and undefined
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found, find
+   * immediately returns that element value. Otherwise, find returns undefined.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findLast(predicate: (value: number, index: number, obj: Int16Array) => boolean, thisArg?: any): number | undefined;
+
+  /**
+   * Returns the index of the last element in the array where predicate is true, and -1
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found,
+   * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findIndexLast(predicate: (value: number, index: number, obj: Int16Array) => boolean, thisArg?: any): number;
+
+
+  /** Copies and reverses the elements in an array.*/
+  toReversed(): Int16Array;
+
+  /**
+   * Copies and sorts an array.
+   * @param compareFn Function used to determine the order of the elements. It is expected to return
+   * a negative value if first argument is less than second argument, zero if they're equal and a positive
+   * value otherwise. If omitted, the elements are sorted in ascending order.
+   * ```ts
+   * [11,2,22,1].sort((a, b) => a - b)
+   * ```
+   */
+  toSorted(compareFn?: (a: number, b: number) => number): Int16Array;
+
+  with(index: number, value: number): Int16Array;
+}
+
+interface Uint16Array {
+  /**
+   * Returns the value of the last element in the array where predicate is true, and undefined
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found, find
+   * immediately returns that element value. Otherwise, find returns undefined.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findLast(predicate: (value: number, index: number, obj: Uint16Array) => boolean, thisArg?: any): number | undefined;
+
+  /**
+   * Returns the index of the last element in the array where predicate is true, and -1
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found,
+   * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findIndexLast(predicate: (value: number, index: number, obj: Uint16Array) => boolean, thisArg?: any): number;
+
+
+  /** Copies and reverses the elements in an array.*/
+  toReversed(): Uint16Array;
+
+  /**
+   * Copies and sorts an array.
+   * @param compareFn Function used to determine the order of the elements. It is expected to return
+   * a negative value if first argument is less than second argument, zero if they're equal and a positive
+   * value otherwise. If omitted, the elements are sorted in ascending order.
+   * ```ts
+   * [11,2,22,1].sort((a, b) => a - b)
+   * ```
+   */
+  toSorted(compareFn?: (a: number, b: number) => number): Uint16Array;
+
+  with(index: number, value: number): Uint16Array;
+}
+
+interface Int32Array {
+  /**
+   * Returns the value of the last element in the array where predicate is true, and undefined
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found, find
+   * immediately returns that element value. Otherwise, find returns undefined.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findLast(predicate: (value: number, index: number, obj: Int32Array) => boolean, thisArg?: any): number | undefined;
+
+  /**
+   * Returns the index of the last element in the array where predicate is true, and -1
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found,
+   * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findIndexLast(predicate: (value: number, index: number, obj: Int32Array) => boolean, thisArg?: any): number;
+
+  /** Copies and reverses the elements in an array.*/
+  toReversed(): Int32Array;
+
+  /**
+   * Copies and sorts an array.
+   * @param compareFn Function used to determine the order of the elements. It is expected to return
+   * a negative value if first argument is less than second argument, zero if they're equal and a positive
+   * value otherwise. If omitted, the elements are sorted in ascending order.
+   * ```ts
+   * [11,2,22,1].sort((a, b) => a - b)
+   * ```
+   */
+  toSorted(compareFn?: (a: number, b: number) => number): Int32Array;
+
+  with(index: number, value: number): Int32Array;
+}
+
+interface Uint32Array {
+  /**
+   * Returns the value of the last element in the array where predicate is true, and undefined
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found, find
+   * immediately returns that element value. Otherwise, find returns undefined.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findLast(predicate: (value: number, index: number, obj: Uint32Array) => boolean, thisArg?: any): number | undefined;
+
+  /**
+   * Returns the index of the last element in the array where predicate is true, and -1
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found,
+   * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findIndexLast(predicate: (value: number, index: number, obj: Uint32Array) => boolean, thisArg?: any): number;
+
+  /** Copies and reverses the elements in an array.*/
+  toReversed(): Uint32Array;
+
+  /**
+   * Copies and sorts an array.
+   * @param compareFn Function used to determine the order of the elements. It is expected to return
+   * a negative value if first argument is less than second argument, zero if they're equal and a positive
+   * value otherwise. If omitted, the elements are sorted in ascending order.
+   * ```ts
+   * [11,2,22,1].sort((a, b) => a - b)
+   * ```
+   */
+  toSorted(compareFn?: (a: number, b: number) => number): Uint32Array;
+
+  with(index: number, value: number): Uint32Array;
+}
+
+interface Float32Array {
+  /**
+   * Returns the value of the last element in the array where predicate is true, and undefined
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found, find
+   * immediately returns that element value. Otherwise, find returns undefined.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findLast(predicate: (value: number, index: number, obj: Float32Array) => boolean, thisArg?: any): number | undefined;
+
+  /**
+   * Returns the index of the last element in the array where predicate is true, and -1
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found,
+   * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findIndexLast(predicate: (value: number, index: number, obj: Float32Array) => boolean, thisArg?: any): number;
+
+  /** Copies and reverses the elements in an array.*/
+  toReversed(): Float32Array;
+
+  /**
+   * Copies and sorts an array.
+   * @param compareFn Function used to determine the order of the elements. It is expected to return
+   * a negative value if first argument is less than second argument, zero if they're equal and a positive
+   * value otherwise. If omitted, the elements are sorted in ascending order.
+   * ```ts
+   * [11,2,22,1].sort((a, b) => a - b)
+   * ```
+   */
+  toSorted(compareFn?: (a: number, b: number) => number): Float32Array;
+
+  with(index: number, value: number): Float32Array;
+}
+
+interface Float64Array {
+  /**
+   * Returns the value of the last element in the array where predicate is true, and undefined
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found, find
+   * immediately returns that element value. Otherwise, find returns undefined.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findLast(predicate: (value: number, index: number, obj: Float64Array) => boolean, thisArg?: any): number | undefined;
+
+  /**
+   * Returns the index of the last element in the array where predicate is true, and -1
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found,
+   * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findIndexLast(predicate: (value: number, index: number, obj: Float64Array) => boolean, thisArg?: any): number;
+
+  /** Copies and reverses the elements in an array.*/
+  toReversed(): Float64Array;
+
+  /**
+   * Copies and sorts an array.
+   * @param compareFn Function used to determine the order of the elements. It is expected to return
+   * a negative value if first argument is less than second argument, zero if they're equal and a positive
+   * value otherwise. If omitted, the elements are sorted in ascending order.
+   * ```ts
+   * [11,2,22,1].sort((a, b) => a - b)
+   * ```
+   */
+  toSorted(compareFn?: (a: number, b: number) => number): Float64Array;
+
+  with(index: number, value: number): Float64Array;
+}
+
+interface BigInt64Array {
+  /**
+   * Returns the value of the last element in the array where predicate is true, and undefined
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found, find
+   * immediately returns that element value. Otherwise, find returns undefined.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findLast(predicate: (value: bigint, index: number, obj: BigInt64Array) => boolean, thisArg?: any): bigint | undefined;
+
+  /**
+   * Returns the index of the last element in the array where predicate is true, and -1
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found,
+   * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findIndexLast(predicate: (value: bigint, index: number, obj: BigInt64Array) => boolean, thisArg?: any): bigint;
+
+  /** Copies and reverses the elements in an array.*/
+  toReversed(): BigInt64Array;
+
+  /**
+   * Copies and sorts an array.
+   * @param compareFn Function used to determine the order of the elements. It is expected to return
+   * a negative value if first argument is less than second argument, zero if they're equal and a positive
+   * value otherwise. If omitted, the elements are sorted in ascending order.
+   * ```ts
+   * [11,2,22,1].sort((a, b) => a - b)
+   * ```
+   */
+  toSorted(compareFn?: (a: bigint, b: bigint) => number | bigint): BigInt64Array;
+
+  with(index: number, value: number): BigInt64Array;
+}
+
+interface BigUint64Array {
+  /**
+   * Returns the value of the last element in the array where predicate is true, and undefined
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found, find
+   * immediately returns that element value. Otherwise, find returns undefined.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findLast(predicate: (value: bigint, index: number, obj: BigUint64Array) => boolean, thisArg?: any): bigint | undefined;
+
+  /**
+   * Returns the index of the last element in the array where predicate is true, and -1
+   * otherwise.
+   * @param predicate find calls predicate once for each element of the array, in ascending
+   * order, until it finds one where predicate returns true. If such an element is found,
+   * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+   * @param thisArg If provided, it will be used as the this value for each invocation of
+   * predicate. If it is not provided, undefined is used instead.
+   */
+  findIndexLast(predicate: (value: bigint, index: number, obj: BigUint64Array) => boolean, thisArg?: any): bigint;
+
+  /** Copies and reverses the elements in an array.*/
+  toReversed(): BigUint64Array;
+
+  /**
+   * Copies and sorts an array.
+   * @param compareFn Function used to determine the order of the elements. It is expected to return
+   * a negative value if first argument is less than second argument, zero if they're equal and a positive
+   * value otherwise. If omitted, the elements are sorted in ascending order.
+   * ```ts
+   * [11,2,22,1].sort((a, b) => a - b)
+   * ```
+   */
+  toSorted(compareFn?: (a: bigint, b: bigint) => number | bigint): BigUint64Array;
+
+  with(index: number, value: number): BigUint64Array;
+}