public function get_range_slice($keyspace, $column_parent, $predicate, $start_key, $finish_key, $row_count, $consistency_level)
{
$this->send_get_range_slice($keyspace, $column_parent, $predicate, $start_key, $finish_key, $row_count, $consistency_level);
return $this->recv_get_range_slice();
}