original_string: public function stream_close() {
      assert(isset($this->client));
      $this->client->close();
      $this->client = null;
    }
code: public function stream_close() {
      assert(isset($this->client));
      $this->client->close();
      $this->client = null;
    }
code_tokens: public function stream_close ( ) { assert ( isset ( $ this -> client ) ) ; $ this -> client -> close ( ) ; $ this -> client = null ; }
docstring: All resources that were locked, or allocated, by the wrapper should be
  released.
  
  No value is returned.
docstring_tokens: All resources that were locked or allocated by the wrapper should be released .