luhn-generator/update/node_modules/rxjs/src/internal/Operator.ts

A generator of numbers that passes the validation of Luhn algorithm or Luhn formula, also known as the 'modulus 10' or 'mod 10' algorithm

import { Subscriber } from './Subscriber';
import { TeardownLogic } from './types';

export interface Operator<T, R> {
  call(subscriber: Subscriber<R>, source: any): TeardownLogic;
}