public void OnChildCompletedEmpty <TCallbacks>(ref PairContinuation report, ref CollisionBatcher <TCallbacks> batcher) where TCallbacks : struct, ICollisionCallbacks
 {
     Inner.OnChildCompletedEmpty(ref report, ref batcher);
 }
 public unsafe void OnChildCompleted <TCallbacks>(ref PairContinuation report, ref ConvexContactManifold manifold, ref CollisionBatcher <TCallbacks> batcher)
     where TCallbacks : struct, ICollisionCallbacks
 {
     Inner.OnChildCompleted(ref report, ref manifold, ref batcher);
 }