On the way: filter and steps (Eventing 5)
A filter decides which events an event subscription passes on, and a step changes each event before it reaches the channel, here by turning a JSON body into fields.
Commands and the docs page: https://weik.io/university/video/eventing-5-filter-and-steps.html
The docs page this video teaches:
Subscriptions, filters and steps: https://weik.io/docs/events/subscriptions
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