Bug 28575 Hierarchy view updates items twice [type hierarchy]
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/TypeHierarchyViewPart.java
*/
	public void createPartControl(Composite container) {
						
		fPagebook= new PageBook(container, SWT.NONE);
						
		
		fTypeMethodsSplitter= new SashForm(fPagebook, SWT.VERTICAL);
		fTypeMethodsSplitter.setVisible(false);
		fTypeViewerViewForm= new ViewForm(fTypeMethodsSplitter, SWT.NONE);
				
		Control typeViewerControl= createTypeViewerControl(fTypeViewerViewForm);
		fTypeViewerViewForm.setContent(typeViewerControl);
				
		fMethodViewerViewForm= new ViewForm(fTypeMethodsSplitter, SWT.NONE);
		fTypeMethodsSplitter.setWeights(new int[] {35, 65});
		
		Control methodViewerPart= createMethodViewerControl(fMethodViewerViewForm);
		fMethodViewerViewForm.setContent(methodViewerPart);
		
		fMethodViewerPaneLabel= new CLabel(fMethodViewerViewForm, SWT.NONE);
		fMethodViewerViewForm.setTopLeft(fMethodViewerPaneLabel);
				
		ToolBar methodViewerToolBar= new ToolBar(fMethodViewerViewForm, SWT.FLAT | SWT.WRAP);
		fMethodViewerViewForm.setTopCenter(methodViewerToolBar);
		
		
		fNoHierarchyShownLabel= new Label(fPagebook, SWT.TOP + SWT.LEFT + SWT.WRAP);
		fNoHierarchyShownLabel.setText(TypeHierarchyMessages.getString("TypeHierarchyViewPart.empty")); 	
		
		MenuManager menu= new MenuManager();