Bug 65268 [projection] editor is missing collapse all action for code folding
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
*/
	protected boolean affectsOverrideIndicatorAnnotations(PropertyChangeEvent event) {
		String key= event.getProperty();
		AnnotationPreference preference= getAnnotationPreferenceLookup().getAnnotationPreference(OverrideIndicatorManager.ANNOTATION_TYPE);
		if (key == null || preference == null)
			return false;
		return key.equals(preference.getHighlightPreferenceKey())
			|| key.equals(preference.getVerticalRulerPreferenceKey())
			|| key.equals(preference.getOverviewRulerPreferenceKey())
			|| key.equals(preference.getTextPreferenceKey());
	}
	/**
	 * @return <code>true</code> if Semantic Highlighting is enabled.
	 *
	 * @since 3.0
	 */
	private boolean isSemanticHighlightingEnabled() {
		return SemanticHighlightings.isEnabled(getPreferenceStore());
	}
	/**
	 * Install Semantic Highlighting.
	 *
	 * @since 3.0
	 */
	private void installSemanticHighlighting() {
		if (fSemanticManager == null) {
			fSemanticManager= new SemanticHighlightingManager();
			fSemanticManager.install(this, (JavaSourceViewer) getSourceViewer(), JavaPlugin.getDefault().getJavaTextTools().getColorManager(), getPreferenceStore());
		}
	}