Bug 124569 [projection] expose projection model updater on JavaEditor
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
}
	}
	protected void installOverrideIndicator(boolean provideAST) {
		uninstallOverrideIndicator();
		IAnnotationModel model= getDocumentProvider().getAnnotationModel(getEditorInput());
		final IJavaElement inputElement= getInputJavaElement();
		if (model == null || inputElement == null)
			return;
		fOverrideIndicatorManager= new OverrideIndicatorManager(model, inputElement, null);
		if (provideAST) {
			Job job= new Job(JavaEditorMessages.OverrideIndicatorManager_intallJob) {
				/*
				 * @see org.eclipse.core.runtime.jobs.Job#run(org.eclipse.core.runtime.IProgressMonitor)
				 * @since 3.0
				 */
				protected IStatus run(IProgressMonitor monitor) {
					CompilationUnit ast= JavaPlugin.getDefault().getASTProvider().getAST(inputElement, ASTProvider.WAIT_YES, null);
					if (fOverrideIndicatorManager != null) 
						fOverrideIndicatorManager.reconciled(ast, true, monitor);
					return Status.OK_STATUS;
				}
			};
			job.setPriority(Job.DECORATE);
			job.setSystem(true);
			job.schedule();
		}
	}
	/**
	 * Tells whether override indicators are shown.
	 *