Function test

lib/internal/util/debuglog.js:115–119

()

  };
  let enabled;
  let test = () => {
    init();
    test = () => enabled;
    return enabled;
  };
  const logger = (...args) => {
    // Improve performance when debug is disabled, avoid calling `new SafeArrayIterator(args)`
    if (enabled === false) return;