typedef struct bt_value *(*bt_component_class_query_method)(
struct bt_component_class *component_class,
const char *object, struct bt_value *params);
typedef enum bt_component_status (*bt_component_class_accept_port_connection_method)(
typedef struct bt_value *(*bt_component_class_query_method)(
struct bt_component_class *component_class,
const char *object, struct bt_value *params);
typedef enum bt_component_status (*bt_component_class_accept_port_connection_method)(