public void addTriggerGroupToNeverDelete(String group){
  if (group != null)   triggerGroupsToNeverDelete.add(group);
}

public void addTriggerGroupToNeverDelete ( String group ) { if ( group != null ) triggerGroupsToNeverDelete . add ( group ) ; }
add the given group to the list of trigger groups that will never be deleted by this processor , even if a pre - processing - command to delete the group is encountered .
