* @return the context type registry for this plug-in instance
*/
public static ContextTypeRegistry getContextTypeRegistry() {
if (fRegistry == null) {
// create and configure the contexts available in the template editor
fRegistry = new ContributionContextTypeRegistry();
fRegistry.addContextType(EmmetContextType.CTX_HTML);
fRegistry.addContextType(EmmetContextType.CTX_CSS);
fRegistry.addContextType(EmmetContextType.CTX_XML);
fRegistry.addContextType(EmmetContextType.CTX_XSL);
fRegistry.addContextType(EmmetContextType.CTX_HAML);