Google Object Detection API - COCO mAP only for some classes?

Hi all.

I’m using Google Object Detection API and EfficientDet D7 1536x1536 model.

I’m using this model for detect not all classes , but only 14.

The COCO mAP in for all models (in this case COCO mAP = 51.2 ) is calculated for all classes.

What is COCO mAP only for classes that I want to detect? How can I get this COCO mAP?