export declare class ImmutableArray<T> {
    private arr;
    readonly value: T[];
    readonly length: number;
    constructor(arr?: T[]);
    /**
     * Instantiate a new array
     */
    set: (newArray: T[]) => T[];
    /**
     * Add one or many elements to the end of the array and returns the new array.
     */
    push: (...elements: any[]) => T[];
    /**
     * Add one or many elements to the start of the array and returns the new array.
     */
    shift: (...elements: any[]) => T[];
    /**
     * Merge two or more arrays.
     */
    concat: (...args: any[]) => T[];
    /**
     * Create a shallow copy of the array
     */
    clone: () => T[];
    /**
     * Remove the last element from the array
     */
    pop: () => any;
    /**
     * Add one or many elements to the start of the array and returns the new array.
     */
    unshift: (...elements: any[]) => T[];
    /**
     * Add one or many elements to the start of the array and returns the new array.
     */
    delete: (...elements: any[]) => T[];
    slide: (start?: number, end?: number) => T[];
}