declare global {
    interface Array<T> {
        first(): T | undefined;
        last(): T | undefined;
        findById(id: number): T | undefined;
        findIndexById(id: number): T | undefined;
        filterById(id: number): T | undefined;
        compare(secondArray: any): boolean | undefined;
    }
}
export declare function register(params: any): void;
export declare const types: {
    isBoolean: (value: any) => value is boolean;
    isString: (value: any) => value is string;
    isObject: (value: any) => boolean;
    isArray: (value: any) => value is any[];
    isFunction: (value: any) => boolean;
    isNumber: (value: any) => value is number;
};
export declare const content: {
    isNotEmptyObject: (value: any) => boolean;
    isNotEmptyArray: (value: any) => boolean;
    isNotEmptyString: (value: any) => string | false;
};