typedef struct bt_error_cause bt_error_cause;
typedef struct bt_event bt_event;
typedef struct bt_event_class bt_event_class;
-typedef struct bt_event_header_field bt_event_header_field;
typedef struct bt_field bt_field;
typedef struct bt_field_class bt_field_class;
typedef struct bt_field_class_enumeration_mapping bt_field_class_enumeration_mapping;