import { Functional } from '../../../../Class/Functional';
import { Done } from '../../../../Class/Functional/Done';
import { System } from '../../../../system';
export interface I<T> {
    a: T[];
}
export interface O {
    length: number;
}
export default class Length<T> extends Functional<I<T>, O> {
    constructor(system: System);
    f(i: I<T>, done: Done<O>): void;
}
