@Override
    public String toString() {
        return GrpcSerializationFormatProvider.class.getSimpleName();
    }
{@link SerializationFormatProvider} that provides the gRPC-related {@link SerializationFormat}s.
grpc-protocol/src/main/java/com/linecorp/armeria/internal/common/grpc/protocol/GrpcSerializationFormatProvider.java