original_string: public function getPersistence()
      {
          if (null === $this->persistence) {
              $this->persistence = (isset($this->options['persistence']) && $this->options['persistence'] == true);
          }
          
          return $this->persistence;
      }
code: public function getPersistence()
      {
          if (null === $this->persistence) {
              $this->persistence = (isset($this->options['persistence']) && $this->options['persistence'] == true);
          }
          
          return $this->persistence;
      }
code_tokens: public function getPersistence ( ) { if ( null === $ this -> persistence ) { $ this -> persistence = ( isset ( $ this -> options [ 'persistence' ] ) && $ this -> options [ 'persistence' ] == true ) ; } return $ this -> persistence ; }
docstring: Check persistance.
  
  @return bool
docstring_tokens: Check persistance .