code: function replace() {
  
      if (!isOriginal) return;
      else isOriginal = false;
  
      function replaceWith(fn) {
          return function() {
              /* eslint prefer-rest-params:0 */
              // todo: once node v4 support dropped, use rest parameter instead
              fn.apply(logger, Array.from(arguments));
          };
      }
  
      ['log', 'debug', 'info', 'warn', 'error'].forEach((lvl) => {
          console[lvl] = function() {
              Array.prototype.slice.call(arguments).forEach((arg) => {
                  write(lvl == "error" ? process.stderr : process.stdout, lvl, arg);
              });
          };
      });
  
  }
docs: Replace global console api