original_string: public function cacheReset($key = null) {
          if (is_null($key)) {
              $this->_cache = array();
          } else {
              unset($this->_cache[$key]);
          }
      }
code: public function cacheReset($key = null) {
          if (is_null($key)) {
              $this->_cache = array();
          } else {
              unset($this->_cache[$key]);
          }
      }
code_tokens: public function cacheReset ( $ key = null ) { if ( is_null ( $ key ) ) { $ this -> _cache = array ( ) ; } else { unset ( $ this -> _cache [ $ key ] ) ; } }
docstring: Reset the local cache for this token
  
  You can pass in an optional $key parameter to reset just that key, otherwise all
  the cache will be reset
  
  @param string|null $key The key to reset
docstring_tokens: Reset the local cache for this token