public function useCache()
    {
        if (is_callable($this->get_cache_callback)
            && is_callable($this->set_cache_callback)
            && is_callable($this->delete_cache_callback)) {
            return true;
        }

        return false;
    }
public function useCache()
    {
        if (is_callable($this->get_cache_callback)
            && is_callable($this->set_cache_callback)
            && is_callable($this->delete_cache_callback)) {
            return true;
        }

        return false;
    }
public function useCache ( ) { if ( is_callable ( $ this -> get_cache_callback ) && is_callable ( $ this -> set_cache_callback ) && is_callable ( $ this -> delete_cache_callback ) ) { return true ; } return false ; }
Determine if Cache is activated for this type

@return  boolean
@since   1.0
Determine if Cache is activated for this type