public static boolean tuple_variable(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "tuple_variable")) return false;
    boolean r;
    Marker m = enter_section_(b, l, _COLLAPSE_, VARIABLE, "<tuple variable>");
    r = weak_keyword(b, l + 1);
    if (!r) r = consumeToken(b, IDENTIFIER);
    exit_section_(b, l, m, r, false, null);
    return r;
  }
public static boolean tuple_variable(PsiBuilder b, int l)