public static boolean command_substitution_command(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "command_substitution_command")) return false;
    boolean r, p;
    Marker m = enter_section_(b, l, _NONE_, COMMAND_SUBSTITUTION_COMMAND, "<command substitution command>");
    r = command_substitution_command_0(b, l + 1);
    r = r && consumeToken(b, OPEN_BACKQUOTE);
    p = r; // pin = 2
    r = r && report_error_(b, withOn(b, l + 1, "BACKQUOTE", ShParser::command_substitution_command_2_1));
    r = p && consumeToken(b, CLOSE_BACKQUOTE) && r;
    exit_section_(b, l, m, r, p, null);
    return r || p;
  }
public static boolean command_substitution_command(PsiBuilder b, int l)