The run_state of the lower level concept keyframe model (formerly known as animation) was exposed to clients and they have been directly talked to the keyframe models ever since. It makes operating animations easier for the clients as they have more controls on the lower level components. However, this makes the cc side animation harder to maintain. e.g. exposing two kinds of APIs. Eventually we'd like to refactor all the clients to use the high level APIs and keep the low level concepts as internal implementation details.

However, this bug was filed against animation worklet which we now have a workaround (by setting RunState::PAUSE to all of its keyframe models). Therefore closing the bug as wont fix. The refactor work mentioned above should be tracked in a separate bug when time comes.