static boolean type_argument(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "type_argument")) return false;
    boolean r;
    Marker m = enter_section_(b, l, _NONE_, null, "<type argument>");
    r = any_type_element(b, l + 1);
    if (!r) r = wildcard_type_element(b, l + 1);
    exit_section_(b, l, m, r, false, null);
    return r;
  }
static boolean type_argument(PsiBuilder b, int l)