private RMContainer createReservedRMContainer(
     ApplicationAttemptId appAttId,
     int id,
     Resource resource,
     NodeId nodeId,
     Priority reservedPriority) {
   RMContainer container = createRMContainer(appAttId, id, resource);
   when(container.getReservedResource()).thenReturn(resource);
   when(container.getReservedPriority()).thenReturn(reservedPriority);
   when(container.getReservedNode()).thenReturn(nodeId);
   return container;
 }