original_string: public function config($config = null)
      {
          if ($this->_config) {
              return $this->_config;
          }
          $this->_config = $config;
          return $this->_config;
      }
code: public function config($config = null)
      {
          if ($this->_config) {
              return $this->_config;
          }
          $this->_config = $config;
          return $this->_config;
      }
code_tokens: public function config ( $ config = null ) { if ( $ this -> _config ) { return $ this -> _config ; } $ this -> _config = $ config ; return $ this -> _config ; }
docstring: Gets and Sets our configuration array for our connection class.
  
  @param null $config
  @return null
docstring_tokens: Gets and Sets our configuration array for our connection class .