I would like to create a custom Vega transformation, specifically to put time ranges into arbitrary buckets such that they never overlap in a given bucket (basically to show the duration and disposition of a set of tasks that have been processed). I've looked over the existing transform code, and read through the Vega extension API docs, and this sounds doable.
What I can't figure out, though, is how to actually call the Vega extensibility API. Are there any examples of similar extensions or plug-ins that do similar work? Or can you point me to how I could gain access via some other channel? I've been unable to find anything related on GitHub.