checkState(maybeInputType.isPresent(), "RPC method %s has no input", rpcMethod.getName());
final Class<? extends DataContainer> inputType = maybeInputType.get();
refExtractor = ContextReferenceExtractor.from(inputType);
checkState(maybeInputType.isPresent(), "RPC method %s has no input", rpcMethod.getName());
final Class<? extends DataContainer> inputType = maybeInputType.get();
refExtractor = ContextReferenceExtractor.from(inputType);