OptionalregisterOptionalunregisterCalled by LayerManager.dispose() or setAdapter(null) to clean up.
OptionalonCalled when a new layer is added and ready.
OptionalonCalled when a layer is removed.
OptionalonCalled when a layer's visibility changes.
OptionalonCalled when a layer's computed opacity changes.
OptionalonCalled when a layer's time info is updated.
OptionalonCalled when a layer's data payload is updated.
Called by LayerManager.start() (or setAdapter()) to give the adapter a reference back into the manager for querying state.