상속: IDisposable
 internal static HandleRef getCPtr(btGearConstraint obj) {
   return (obj == null) ? new HandleRef(null, IntPtr.Zero) : obj.swigCPtr;
 }
 internal static HandleRef getCPtr(btGearConstraint obj)
 {
     return((obj == null) ? new HandleRef(null, IntPtr.Zero) : obj.swigCPtr);
 }