I'm not sure whether this is the right approach. There's a lot going on in here, and passing the `mutated_labels` dict around seems very hard to track and error-prone. Do we really need this reverse lookup?
[ Full content available at: https://github.com/apache/incubator-superset/pull/5827 ] This message was relayed via gitbox.apache.org for devnull@infra.apache.org
