Bug 80473 [rulers][preferences] allow disabling of range indicator on left of java editor
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
}
	/**
	 * Determines whether the preference change encoded by the given event
	 * changes the override indication.
	 *
	 * @param event the event to be investigated
	 * @return <code>true</code> if event causes a change
	 * @since 3.0
	 */
	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.
	 *