static boolean extensibleStringKey_(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "extensibleStringKey_")) return false;
    if (!nextTokenIs(b, "", LANGUAGE, LINKER)) return false;
    boolean r;
    r = consumeToken(b, LANGUAGE);
    if (!r) r = consumeToken(b, LINKER);
    return r;
  }
static boolean extensibleStringKey_(PsiBuilder b, int l)