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
public void run() {
							firePropertyChangeEvent(event.getKey(), event.getOldValue(), event.getNewValue());
						}
					});
				} else {
					firePropertyChangeEvent(event.getKey(), event.getOldValue(), event.getNewValue());
				}
			}
		}
		
		private ListenerList fListeners= new ListenerList();
		
		private IEclipsePreferences.IPreferenceChangeListener fListener= new PreferenceChangeListener();
		
		private final IScopeContext fContext;
		private final String fQualifier;
		/**
		 * Initialize with the node to wrap
		 *
		 * @param context The context to access
		 */
		public EclipsePreferencesAdapter(IScopeContext context, String qualifier) {
			fContext= context;
			fQualifier= qualifier;
		}
		private IEclipsePreferences getNode() {
			return fContext.getNode(fQualifier);
		}
		/**
		 * {@inheritDoc}