text: from .anchor_head_multi import AnchorHeadMulti
  from .anchor_head_multi_imprecise import AnchorHeadMultiImprecise
  from .anchor_head_single import AnchorHeadSingle
  from .anchor_head_single_imprecise import AnchorHeadSingleImprecise
  from .anchor_head_template import AnchorHeadTemplate
  from .point_head_box import PointHeadBox
  from .point_head_simple import PointHeadSimple
  from .point_intra_part_head import PointIntraPartOffsetHead
  from .center_head import CenterHead
  
  __all__ = {
      'AnchorHeadTemplate': AnchorHeadTemplate,
      'AnchorHeadSingle': AnchorHeadSingle,
      'AnchorHeadSingleImprecise': AnchorHeadSingleImprecise,
      'PointIntraPartOffsetHead': PointIntraPartOffsetHead,
      'PointHeadSimple': PointHeadSimple,
      'PointHeadBox': PointHeadBox,
      'AnchorHeadMulti': AnchorHeadMulti,
      'AnchorHeadMultiImprecise': AnchorHeadMultiImprecise,
      'CenterHead': CenterHead
  }
  