Bug 245457 [Forms] ExpandableComposite should have option of not drawing the title focus box
bundles/org.eclipse.ui.forms/src/org/eclipse/ui/forms/widgets/ExpandableComposite.java
private SizeCache toggleCache = new SizeCache();
		private SizeCache textClientCache = new SizeCache();
		private SizeCache textLabelCache = new SizeCache();
		private SizeCache descriptionCache = new SizeCache();
		private SizeCache clientCache = new SizeCache();
		private void initCache(boolean shouldFlush) {
			toggleCache.setControl(toggle);
			textClientCache.setControl(textClient);
			textLabelCache.setControl(textLabel);
			descriptionCache.setControl(getDescriptionControl());
			clientCache.setControl(client);
			if (shouldFlush) {
				toggleCache.flush();
				textClientCache.flush();
				textLabelCache.flush();
				descriptionCache.flush();
				clientCache.flush();
			}