import { Promised } from "./utils";
declare global {
    interface Generator<T = unknown, TReturn = any, TNext = unknown> {
        /**
         * Returns the number of elements in a sequence.
         * @returns The number of elements in the input sequence.
         */
        count(): number;
        /**
         * Returns a number that represents how many elements in the specified sequence satisfy a condition.
         * @param predicate A number that represents how many elements in the sequence satisfy the condition in the predicate function.
         * @returns A function to test each element for a condition.
         */
        count(predicate: (item: T) => boolean): number;
    }
    interface AsyncGenerator<T = unknown, TReturn = any, TNext = unknown> {
        count(): Promise<number>;
        count(predicate: (item: T) => Promised<boolean>): Promise<number>;
    }
}