Interface Array

src/Util/CollectionUtil.ts:4–11

declare global {
    interface Array<T> {
        /** Returns the last element from an array */
        last(): T;
        /** Deletes all elements from an array */
        clear(): void;
        /** Returns true if the element is found in the array */
        contains(elem: T): boolean;
    }
}

if (!Array.prototype.last) {