code: public MessageadapterType<InboundResourceadapterType<T>> getOrCreateMessageadapter()
     {
        Node node = childNode.getOrCreate("messageadapter");
        MessageadapterType<InboundResourceadapterType<T>> messageadapter = new MessageadapterTypeImpl<InboundResourceadapterType<T>>(this, "messageadapter", childNode, node);
        return messageadapter;
     }
docs: If not already created, a new <code>messageadapter</code> element with the given value will be created.
  Otherwise, the existing <code>messageadapter</code> element will be returned.
  @return  a new or existing instance of <code>MessageadapterType<InboundResourceadapterType<T>></code>