class_docstr: FoveaBox: Beyond Anchor-based Object Detector
  https://arxiv.org/abs/1904.03797
code: def _get_points_single(self, *args, **kwargs):
      y, x = super()._get_points_single(*args, **kwargs)
      return y + 0.5, x + 0.5
  
imports: import torch
  import torch.nn
  from mmcv.cnn import ConvModule, normal_init
  from mmcv.ops import DeformConv2d
  from mmdet.core import multi_apply, multiclass_nms
  from ..builder import HEADS
  from .anchor_free_head import AnchorFreeHead
label_desc: Use image node_id 5 for calling the FoveaHead obj's underlying member method code with example usage: obj._get_points_single() and returns: unknown,  unknown