code: public int run() throws IOException {
      ConfigCheckReport report = mMetaMasterClient.getConfigReport();
      ConfigStatus configStatus = report.getConfigStatus();
      if (configStatus == ConfigStatus.PASSED) {
        // No errors or warnings to show
        mPrintStream.println("No server-side configuration errors or warnings.");
        return 0;
      }
  
      Map<Scope, List<InconsistentProperty>> errors = report.getConfigErrors();
      if (errors.size() != 0) {
        mPrintStream.println("Server-side configuration errors "
            + "(those properties are required to be identical): ");
        printInconsistentProperties(errors);
      }
  
      Map<Scope, List<InconsistentProperty>> warnings = report.getConfigWarns();
      if (warnings.size() != 0) {
        mPrintStream.println("\nServer-side configuration warnings "
            + "(those properties are recommended to be identical): ");
        printInconsistentProperties(warnings);
      }
      return 0;
    }
docs: Runs doctor configuration command.
  
  @return 0 on success, 1 otherwise