Kexin

I am wondering if there is a feature flag in the library to disallow remote references during validation? For example, only internal references are allowed: ``` { "definitions": { "pet":...

Looking at the Protobuf documentation of updating a schema for [proto2](https://developers.google.com/protocol-buffers/docs/proto#updating) and [proto3](https://developers.google.com/protocol-buffers/docs/proto3#updating), I notice that the following rules are missing for Protobuf schema compatibility module: | Rule | Description...