Changes the fixture selection to be the one supplied
Namespace: PlaybackFixtureOrderStep
Void PlaybackFixtureOrderStep.SetNewSelection(IEnumerable<FixtureHandle> newSelection)
http://[ip]:4430/titan/script/2/PlaybackFixtureOrderStep/SetNewSelection?newSelection={}
newSelection ( IEnumerable<FixtureHandle> ) : A list of handles to add to the new selection.