luhn-generator/update/node_modules/rxjs/src/internal/util/isScheduler.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 { SchedulerLike } from '../types';

export function isScheduler(value: any): value is SchedulerLike {
  return value && typeof (<any>value).schedule === 'function';
}