Classes used in client-side implementation of remote procedure calls.
Most applications will be interested in AsyncCallback, InvocationException,
RemoteService, and ServiceDefTarget. The other classes in this package are used
primarily in implementing RPC proxies.
This class is defined outside of the CustomFieldSerializerTestSetFactory
because of a bug where custom field serializers cannot be inner classes and
custom field serializers must be in the same package as the class that they
serializer.