code: function getFuncName(func) {
        var result = (func.name + ''),
            array = realNames[result],
            length = hasOwnProperty.call(realNames, result) ? array.length : 0;
  
        while (length--) {
          var data = array[length],
              otherFunc = data.func;
          if (otherFunc == null || otherFunc == func) {
            return data.name;
          }
        }
        return result;
      }
docs: Gets the name of `func`.
  
  @private
  @param {Function} func The function to query.
  @returns {string} Returns the function name.