bt_component_class_sink_query_method query;
bt_component_class_sink_accept_input_port_connection_method accept_input_port_connection;
bt_component_class_sink_input_port_connected_method input_port_connected;
bt_component_class_sink_query_method query;
bt_component_class_sink_accept_input_port_connection_method accept_input_port_connection;
bt_component_class_sink_input_port_connected_method input_port_connected;