pub unsafe extern "C" fn dds_instance_get_key(
entity: dds_entity_t,
inst: dds_instance_handle_t,
data: *mut c_void,
) -> dds_return_tpub unsafe extern "C" fn dds_instance_get_key(
entity: dds_entity_t,
inst: dds_instance_handle_t,
data: *mut c_void,
) -> dds_return_t