text: # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved
  from .backbone import build_fcos_resnet_fpn_backbone
  from .one_stage_detector import OneStageDetector, OneStageRCNN
  from .solov2 import SOLOv2
  
  _EXCLUDE = {"torch", "ShapeSpec"}
  __all__ = [k for k in globals().keys() if k not in _EXCLUDE and not k.startswith("_")]
  