Bug 71354 [painting] IAE in StyledText.getBidiSegments upon revert
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
}
				return;
			}
			
			if (PreferenceConstants.EDITOR_FOLDING_PROVIDER.equals(property)) {
				if (sourceViewer instanceof ProjectionViewer) {
					ProjectionViewer projectionViewer= (ProjectionViewer) sourceViewer;
					if (fProjectionModelUpdater != null)
						fProjectionModelUpdater.uninstall();
					
					fProjectionModelUpdater= JavaPlugin.getDefault().getFoldingStructureProviderRegistry().getCurrentFoldingProvider();
					if (fProjectionModelUpdater != null) {
						fProjectionModelUpdater.install(this, projectionViewer);
					}
				}
				return;
			}
			
			if (DefaultCodeFormatterConstants.FORMATTER_TAB_SIZE.equals(property)) {
				sourceViewer.getTextWidget().setTabs(getSourceViewerConfiguration().getTabWidth(sourceViewer));
				return;
			}
			
			if (PreferenceConstants.EDITOR_FOLDING_ENABLED.equals(property)) {
				if (sourceViewer instanceof ProjectionViewer) {
					new ToggleFoldingRunner().runWhenNextVisible();
				}
				return;
			}