const onlyAllowFirstCall = function()

in src/CallbackContext.js [112:119]

• 8 lines of code
• 2 McCabe index (conditional complexity)

  const onlyAllowFirstCall = function (toWrap) {
    return function () {
      if (!finished) {
        toWrap.apply(null, arguments);
        finished = true;
      }
    };
  };