rustv0_parse_backref
ret = rustv0_parse_backref(st, sv, rustv0_parse_type,
if (!rustv0_parse_backref(st, sv, rustv0_parse_path, in_value))
static boolean_t rustv0_parse_backref(rust_state_t *restrict,
if (rustv0_parse_backref(st, sv, rustv0_parse_const, B_FALSE))