how to deep marshal the block to JSON in fabric-protos-go-apiv2 


In  [fabric-protos-go v1](github.com/hyperledger/fabric-protos-go/),we can use github.com/hyperledger/fabric-config/protolator to DeepMarshalJSON a block
```
protolator.DeepMarshalJSON(&buffer, block)
```


In [fabric-protos-go-apiv2](github.com/hyperledger/fabric-protos-go-apiv2) , how to Deep Marshal a block to json?