*/
private void createContentsForCyclingGroup(Composite parent) {
ICompletionProposalCategoriesConfigurationWriter configurationWriter = CompletionProposoalCatigoriesConfigurationRegistry.getDefault().getWritableConfiguration(XML_CONTENT_TYPE_ID);
if(configurationWriter != null) {
fConfigurationBlock = new CodeAssistCyclingConfigurationBlock(XML_CONTENT_TYPE_ID, configurationWriter);
fConfigurationBlock.createContents(parent, XMLUIMessages.XMLContentAssistPreferencePage_Cycling_UI_);
} else {
Logger.log(Logger.ERROR, "There should be an ICompletionProposalCategoriesConfigurationWriter" + //$NON-NLS-1$
" specified for the XML content type, but can't fine it, thus can't create user" + //$NON-NLS-1$
" preference block for editing proposal categories preferences."); //$NON-NLS-1$