public GrpcServiceBuilder addServiceDefinitions(ServerServiceDefinition... services) {
        requireNonNull(services, "services");
        return addServiceDefinitions(ImmutableList.copyOf(services));
    }
Adds gRPC {@link ServerServiceDefinition}s to this {@link GrpcServiceBuilder}.
grpc/src/main/java/com/linecorp/armeria/server/grpc/GrpcServiceBuilder.java