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doc: clarify version field in events

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Wim Taymans 2020-07-27 16:47:30 +02:00
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doc/spa/design.md
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@ -256,6 +256,11 @@ be called with `my_data` as the first data field. The events are usually
also triggered when the listener is added, to enumerate the current
state of the object.
Events have a `version` field, set to `SPA_VERSION_NODE_EVENTS` in the
above example. It should contain the version of the event structure
you compiled with. When new events are added later, the version field
will be checked and the new signal will be ignored for older versions.
You can remove your listener with:
```c