NamespaceMappings.setNamespaceDeclarationStack(nsStack, nestedExecutionContext);
SmooksContentHandler parentContentHandler = SmooksContentHandler.getHandler(executionContext);
if(parentContentHandler.getNestedContentHandler() != null) {
throw new SmooksException("Illegal use of more than one nested content handler fired on the same element.");
}
SmooksContentHandler nestedContentHandler = new SAXHandler(nestedExecutionContext, element.getWriter(this), parentContentHandler);
DynamicSAXElementVisitorList.propogateDynamicVisitors(executionContext, nestedExecutionContext);