class_docstr: SF3D Detector.
      
class_docstr_tok: ["SF3D","Detector","."]
code: def reference_y_shift(self):
      return 0
  
file_path: face-alignment/face_alignment/detection/sfd/sfd_detector.py
imports: import torch
  from torch.utils.model_zoo import load_url
  from ..core import FaceDetector
  from .net_s3fd import s3fd
  from .bbox import nms
  from .detect import detect, batch_detect
label_desc: Use image node_id 7 for calling the SFDDetector obj's underlying member method code with example usage: obj.reference_y_shift() and returns: int