original_string: public function cache()
      {
          if (null === $this->cache) {
              $this->cache = new WebDriver_Cache($this);
          }
          return $this->cache;
      }
code: public function cache()
      {
          if (null === $this->cache) {
              $this->cache = new WebDriver_Cache($this);
          }
          return $this->cache;
      }
code_tokens: public function cache ( ) { if ( null === $ this -> cache ) { $ this -> cache = new WebDriver_Cache ( $ this ) ; } return $ this -> cache ; }
docstring: Get current context.
  
  @return WebDriver_Cache
docstring_tokens: Get current context .