Bug 27114 something leaks StyleRanges and Lines
180K of StyleReanges and 47K of Lines after: -open editor -close editor seems like StyleRange objects are never freed
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
if (input == null)
				return null;
			try {
				IJavaElement[] elements= ((ICodeAssist) input).codeSelect(offset, 0);
				if (elements == null || elements.length == 0)
					return null;
					
				return selectWord(viewer.getDocument(), offset);
					
			} catch (JavaModelException e) {
				return null;	
			}
		}
		private int getCurrentTextOffset(ISourceViewer viewer) {
			try {					
				StyledText text= viewer.getTextWidget();			
				if (text == null || text.isDisposed())
					return -1;
				Display display= text.getDisplay();				
				Point absolutePosition= display.getCursorLocation();
				Point relativePosition= text.toControl(absolutePosition);
				
				return text.getOffsetAtLocation(relativePosition) + viewer.getVisibleRegion().getOffset();
			} catch (IllegalArgumentException e) {
				return -1;
			}			
		}
		private void highlightRegion(ISourceViewer viewer, IRegion region) {
			if (region.equals(fActiveRegion))
				return;