@Override
  public boolean affectsClusterConfiguration() {
    return true;
  }
Implement this method for updating the configuration of a given group

the implementation should update the passed in config object with appropriate changes if for
any reason config can't be updated. throw a RuntimeException stating the reason.

@param group the name of the group to update cluster config for
@param config the configuration object, never null
@param configObject the return value of CommandResult.getConfigObject. CommandResult is the
       return value of your command method.
@return a boolean indicating whether a change to the cluster configuration was persisted.
geode-gfsh/src/main/java/org/apache/geode/management/cli/SingleGfshCommand.java