Give some rough idea of what to expect. It might be worth creating a separate `TransformDataRegistry` from `TransformPropsRegistry` for performance reason, but I think that will be too much for first pass.
@conglei p.s. code does not run yet. DO NOT MERGE. [ Full content available at: https://github.com/apache/incubator-superset/pull/5882 ] This message was relayed via gitbox.apache.org for [email protected]
