public static boolean conditional_command(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "conditional_command")) return false;
    if (!nextTokenIs(b, "<conditional command>", LEFT_DOUBLE_BRACKET, LEFT_SQUARE)) return false;
    boolean r;
    Marker m = enter_section_(b, l, _NONE_, CONDITIONAL_COMMAND, "<conditional command>");
    r = conditional_command_0(b, l + 1);
    if (!r) r = conditional_command_1(b, l + 1);
    exit_section_(b, l, m, r, false, null);
    return r;
  }
public static boolean conditional_command(PsiBuilder b, int l)