function check(CacheKey $key) {

		if (isset ( $this->elements [$key->getModule()] [$key->getProperty()] )) {
			return true;
		} else {
			return false;
		}
	}
function check(CacheKey $key) {

		if (isset ( $this->elements [$key->getModule()] [$key->getProperty()] )) {
			return true;
		} else {
			return false;
		}
	}
function check ( CacheKey $ key ) { if ( isset ( $ this -> elements [ $ key -> getModule ( ) ] [ $ key -> getProperty ( ) ] ) ) { return true ; } else { return false ; } }
Check is cache entry is set
@param CacheKey $key
@return boolean
Check is cache entry is set