@SuppressWarnings("unchecked")
  public <T extends ManagementService> T getManagementService() {
    return (T) ManagementService.getExistingManagementService(cache);
  }
For those commands that could possibly change the cluster configuration, they need to
override this method to return true.

@return whether the command may change the cluster configuration
geode-gfsh/src/main/java/org/apache/geode/management/cli/GfshCommand.java