private static ServerMethodDefinition<?, ?> createProxyServerMethodDefinition( MethodDescriptor<?, ?> methodDesc, ServerCallHandler<InputStream, InputStream> handler) { MethodDescriptor<InputStream, InputStream> methodDescriptor = MethodDescriptor.newBuilder( IdentityInputStreamMarshaller.of(), IdentityInputStreamMarshaller.of()) .setFullMethodName(methodDesc.getFullMethodName()) .setType(methodDesc.getType()) .setIdempotent(methodDesc.isIdempotent()) .setSafe(methodDesc.isSafe()) .build(); return ServerMethodDefinition.create(methodDescriptor, handler); }