I'm writing a pipeline with the Go SDK and I have some cases where I need to use lookup tables. I see that in Java there is an asMap <https://github.com/apache/beam/issues/18602> that would appear to do that. However I can't figure out how to do the equivalent in Go. I did see this <https://github.com/apache/beam/issues/18602> issue, so perhaps it's simply not possible.
Is there a way to build a map for the purpose of a side input with the Go SDK? Thanks!
