code: func shouldMakeMessages(seq starlark.Sequence) bool {
  	iter := seq.Iterate()
  	defer iter.Done()
  	var v starlark.Value
  	for iter.Next(&v) {
  		if v == starlark.None {
  			return true
  		}
  		if _, ok := v.(*starlark.Dict); ok {
  			return true
  		}
  	}
  	return false
  }
docs: // shouldMakeMessages returns true if seq has at least one dict or None that
  // should be converted to a proto message.