static boolean parameter_type_element_silent(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "parameter_type_element_silent")) return false;
    boolean r;
    r = parameter_type_element(b, l + 1);
    if (!r) r = clear_variants_and_fail(b, l + 1);
    return r;
  }
static boolean parameter_type_element_silent(PsiBuilder b, int l)