The context fixture is the last fixture which was selected. This fixture is used to determine which attribute controls are displayed to the user.
Namespace: KeyFrameShapeFixtureSelection
ActionScript.SetProperty(KeyFrameShapeFixtureSelection.ContextFixtureHandle,[value])
http://[ip]:4430/titan/get/2/KeyFrameShapeFixtureSelection/ContextFixtureHandle
POST /titan/set/2/KeyFrameShapeFixtureSelection/ContextFixtureHandle