Generate JSON Object with the specification with the LLB from a Dockerfile (Dependency Graph)

[briter06]

I'm trying to generate the dependency graph (DAG) from a Dockerfile using the Dockerfile2LLB function. However, the state this function returns contains limited information about the operations, it doesn't contain the information about which operation depends on which operations. How can I generate that information in a JSON format from the Dockerfile? (i.e. RunOp -> FileOp -> SourceOp)

I'm trying the example mentioned in the following file: https://github.com/moby/buildkit/blob/master/examples/dockerfile2llb/main.go

Thank you!