pkgconf_dependency_ref
pkgconf_node_insert_tail(&dep->iter, pkgconf_dependency_ref(dep->owner, dep), list);
return pkgconf_dependency_ref(dep->owner, dep);
return pkgconf_dependency_ref(client, new_dep);
PKGCONF_API pkgconf_dependency_t *pkgconf_dependency_ref(pkgconf_client_t *client, pkgconf_dependency_t *dep);