code: public final void remove(GroupAddress a, boolean fromUpdating)
  	{
  		if (fromUpdating)
  			updating.remove(a);
  		else
  			invalidating.remove(a);
  	}
docs: Removes a state updating/invalidating group address from this datapoint.
  <p>
  The group address is no longer contained in the corresponding updating/invalidating
  category.
  
  @param a the KNX group address to remove
  @param fromUpdating <code>true</code> to remove from updating this datapoint
  state, <code>false</code> to remove from invalidating this datapoint state