void (@NotNull PsiElement newElement) { PsiClass psiClass = (PsiClass) newElement; final String qName = ClassUtil.getJVMClassName(psiClass); if (qName != null) { myItem.setClassName(qName); PaletteItemProvider.EP_NAME.findExtensionOrFail(UIDesignerPaletteProvider.class).fireGroupsChanged(); } }