Gateway Request Routing Rule. Update Definition Stages. With Backend<ParentT>.to Backend(String name) 方法
Associates the request routing rule with a backend on this application gateway.
If the backend does not yet exist, it must be defined in the optional part of the application gateway definition. The request routing rule references it only by name.
public WithAttach<ParentT> toBackend(String name)
the name of an existing backend
the next stage of the definition