setMotionSpeed method
Sets the motion playback speed multiplier for viewId.
1.0 = normal speed, 2.0 = double speed, 0.5 = half speed,
0.0 = effectively paused. Must be ≥ 0.
Physics, eye-blink and expression transitions are NOT affected.
Implementation
Future<void> setMotionSpeed({
required int viewId,
required double speed,
}) {
throw UnimplementedError('setMotionSpeed() has not been implemented.');
}