public void AddMultiBodyConstraint(MultiBodyConstraint constraint)
 {
     btMultiBodyDynamicsWorld_addMultiBodyConstraint(_native, constraint._native);
     _constraints.Add(constraint);
 }
 public void DebugDrawMultiBodyConstraint(MultiBodyConstraint constraint)
 {
     btMultiBodyDynamicsWorld_debugDrawMultiBodyConstraint(_native, constraint._native);
 }
 public void RemoveMultiBodyConstraint(MultiBodyConstraint constraint)
 {
     btMultiBodyDynamicsWorld_removeMultiBodyConstraint(_native, constraint._native);
     _constraints.Remove(constraint);
 }