* @param serviceType
* - Subclass of RpcService for which direct proxy is to be
* generated.
* @return Instance of RpcService of provided serviceType which implements
* and {@link DelegateProxy}
* @throws IllegalArgumentException
* @param serviceType
* - Subclass of RpcService for which direct proxy is to be
* generated.
* @return Instance of RpcService of provided serviceType which implements
* and {@link DelegateProxy}
* @throws IllegalArgumentException