removeTreeItem( );
clearTreeItem( contextItem );
	public void createContextObjects( String methodName )	{		if ( contextItem != null				&& !contextItem.isDisposed( )				&& currentEditObject != null				&& methodName != null )		{			removeTreeItem( );			DesignElementHandle handle = (DesignElementHandle) currentEditObject;			Map argMap = DEUtil.getDesignElementMethodArguments( handle,					methodName );			for ( Iterator iter = argMap.keySet( ).iterator( ); iter.hasNext( ); )			{				String argName = (String) iter.next( );				createSubTreeItem( contextItem,						argName,						IMAGE_METHOD,						argName,						"", //$NON-NLS-1$						true );			}		}	}