private static XmlTag createTag(
     @NotNull XmlTag contextTag, @NotNull XmlElementDescriptor descriptor) {
   String namespace = getNamespace(descriptor);
   XmlTag tag = contextTag.createChildTag(descriptor.getName(), namespace, null, false);
   PsiElement lastChild = tag.getLastChild();
   assert lastChild != null;
   lastChild.delete(); // remove XML_EMPTY_ELEMENT_END
   return tag;
 }