Bug 20700 Code assist activates help UI
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
((ITextConverter) e.next()).customizeDocumentCommand(getDocument(), command);
			}
			fIgnoreTextConverters= false;
		}
		
		public IVerticalRuler getVerticalRuler() {
			return fCachedVerticalRuler;
		}
		
		public boolean isVerticalRulerVisible() {
			return fCachedIsVerticalRulerVisible;
		}
		
		public OverviewRuler getOverviewRuler() {
			return fOverviewRuler;
		}
		
		/*
		 * @see TextViewer#createControl(Composite, int)
		 */
		protected void createControl(Composite parent, int styles) {
			
		}
		
		protected void delayedCreateControl(Composite parent, int styles) {
			
			super.createControl(parent, styles);
			
			Control control= getControl();
			if (control instanceof Composite) {