if ( checked )
if ( model instanceof IProject )
	private void handleCheckStateChanged( IPluginModelBase model,			boolean checked )	{		if ( model.getUnderlyingResource( ) == null )		{			if ( checked )			{				fNumExternalChecked += 1;			}			else			{				fNumExternalChecked -= 1;			}		}		else		{			if ( checked )			{				fNumWorkspaceChecked += 1;			}			else			{				fNumWorkspaceChecked -= 1;			}		}		adjustGroupState( );	}