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Type: attribute name
The attribute that the observer is observing. When the value of the attribute changes, the broadcast event is called on the observer. Use the value * to observe all attribute of the broadcasters. The id, ref, and persist attributes are not observed.

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 Contributors to this page: SphinxKnight, Sheppy, Marsf, Ptak82, Dria
 Last updated by: SphinxKnight,