Bug 123946 [quick assist] "Add keyword 'final' to all unchanged variables and properties"
This function can be provide with the "Format" function
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/fix/CleanUpRefactoringWizard.java
fPreviewDocument.set(text);
				
				fSourceViewer.setRedraw(false);
				final IFormattingContext context = new CommentFormattingContext();
				try {
					final IContentFormatter formatter =	fViewerConfiguration.getContentFormatter(fSourceViewer);
					if (formatter instanceof IContentFormatterExtension) {
						final IContentFormatterExtension extension = (IContentFormatterExtension) formatter;
						context.setProperty(FormattingContextProperties.CONTEXT_PREFERENCES, fWorkingValues);
						context.setProperty(FormattingContextProperties.CONTEXT_DOCUMENT, Boolean.valueOf(true));
						extension.format(fPreviewDocument, context);
					} else
						formatter.format(fPreviewDocument, new Region(0, fPreviewDocument.getLength()));
				} catch (Exception e) {
					final IStatus status= new Status(IStatus.ERROR, JavaPlugin.getPluginId(), IJavaStatusConstants.INTERNAL_ERROR, 
						MultiFixMessages.CleanUpRefactoringWizard_formatterException_errorMessage, e); 
					JavaPlugin.log(status);
				} finally {
				    context.dispose();
				    fSourceViewer.setRedraw(true);
				}
			}
			public void resumeUpdate() {
				fUpdateBlocked= false;
			}
			public void blockUpdate() {
				fUpdateBlocked= true;
			}
			public boolean isUpdateSuspended() {
				return fUpdateBlocked;