Function copy

include/cpp/VirtualArray.h:479–486

      return new VirtualArray_obj( base->__concat(inTail), store==hx::arrayFixed );
   }
   VirtualArray copy( )
   {
      checkBase();
      if (store==hx::arrayEmpty)
         return new VirtualArray_obj(hx::arrayEmpty);

      return new VirtualArray_obj(base->__copy(), store==hx::arrayFixed);
   }
   VirtualArray slice(int inPos, Dynamic end = null())
   {
      checkBase();