code: public String getObjectName(int groupID, int objectID) {
  		if (groupID >= 0 && groupID < objectGroups.size()) {
  			ObjectGroup grp = (ObjectGroup) objectGroups.get(groupID);
  			if (objectID >= 0 && objectID < grp.objects.size()) {
  				GroupObject object = (GroupObject) grp.objects.get(objectID);
  				return object.name;
  			}
  		}
  		return null;
  	}
docs: Return the name of a specific object from a specific group.
  
  @param groupID
  Index of a group
  @param objectID
  Index of an object
  @return The name of an object or null, when error occurred