bt_ctf_object_init(&field->base, is_shared, release_func);
field->methods = methods;
field->type = (void *) bt_ctf_object_get_ref(ft);
bt_ctf_object_init(&field->base, is_shared, release_func);
field->methods = methods;
field->type = (void *) bt_ctf_object_get_ref(ft);