/**
 * Determines whether every element of a sequence satisfy a condition.
 * @param {Iterable<T>} source Source sequence.
 * @param {function(value: T, index: number): boolean} predicate A function to test each element for a condition.
 * @return {boolean} true if every element of the source sequence passes the test in the specified predicate, or
 * if the sequence is empty; otherwise, false.
 */
export declare function every<T, S extends T>(source: Iterable<T>, predicate: (value: T, index: number) => value is S): boolean;
export declare function every<T>(source: Iterable<T>, predicate: (value: T, index: number) => boolean): boolean;