btf__resolve_type
ptr_type_id = btf__resolve_type(d->btf, t->type);
actual_type_id = btf__resolve_type(d->btf, type_id);
LIBBPF_API int btf__resolve_type(const struct btf *btf, __u32 type_id);
type_id = btf__resolve_type(obj->btf, vsi->type);
tid = btf__resolve_type(btf, tid);
sinfo->type = btf__resolve_type(btf, barr->type);
tid = btf__resolve_type(btf, member->type);
tid = btf__resolve_type(btf, t->type);
base_type = btf__type_by_id(btf, btf__resolve_type(btf, sinfo->type));