luhn-generator/update/node_modules/rxjs/src/internal/symbol/iterator.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

export function getSymbolIterator(): symbol {
  if (typeof Symbol !== 'function' || !Symbol.iterator) {
    return '@@iterator' as any;
  }

  return Symbol.iterator;
}

export const iterator = getSymbolIterator();

/**
 * @deprecated use {@link iterator} instead
 */
export const $$iterator = iterator;