public function flush($tag) {
        $args = func_get_args();
        foreach ($args as $item) {
            if (in_array($item, $this->sequence)) {
                $this->$item = [];
            }
        }
        return $this;
    }
public function flush($tag) {
        $args = func_get_args();
        foreach ($args as $item) {
            if (in_array($item, $this->sequence)) {
                $this->$item = [];
            }
        }
        return $this;
    }
public function flush ( $ tag ) { $ args = func_get_args ( ) ; foreach ( $ args as $ item ) { if ( in_array ( $ item , $ this -> sequence ) ) { $ this -> $ item = [ ] ; } } return $ this ; }
MAKE LIKE 'SELECT' TO EMPTY ARRAY!
@param $tag
@return static
MAKE LIKE SELECT TO EMPTY ARRAY!