code: func (self *_object) isCall() bool {
  	switch fn := self.value.(type) {
  	case _nativeFunctionObject:
  		return fn.call != nil
  	case _bindFunctionObject:
  		return true
  	case _nodeFunctionObject:
  		return true
  	}
  	return false
  }
docs: // ======= //
  // _object //
  // ======= //