code: protected Element createDeepElementCopy(Element element, Set<String> copyElements) {
  
          return createDeepElementCopyInternal(null, null, element, copyElements);
      }
docs: Creates a partial deep element copy according to the set of element paths.<p>
  Only elements contained in that set will be copied.
  
  @param element the element to copy
  @param copyElements the set of paths for elements to copy
  
  @return a partial deep copy of <code>element</code>