How to do testing of saved model i.e .pth weight ?I have efficientnetv2 backbone trained model with detectron2. 

I have trained model using efficientnetv2 as backbone  using detectron2 & i have my own custom cfg(custom layers & custom architecture) , so how can I test my model using detectron2? because custom cfg is not supported in detectron2? 
thanks in advance @ppwwyyxx .hope you can help me.