original_string: public function UnsetInput(){
  		unset($this->input, $this->pos, $this->input_len, $this->furthest);
  		$this->saveStack = array();
  	}
code: public function UnsetInput(){
  		unset($this->input, $this->pos, $this->input_len, $this->furthest);
  		$this->saveStack = array();
  	}
code_tokens: public function UnsetInput ( ) { unset ( $ this -> input , $ this -> pos , $ this -> input_len , $ this -> furthest ) ; $ this -> saveStack = array ( ) ; }
docstring: Free up some memory
docstring_tokens: Free up some memory