code: def reference_y_shift(self):
      return 0
  
file_path: face-alignment/face_alignment/detection/dlib/dlib_detector.py
imports: import warnings
  import cv2
  import dlib
  from ..core import FaceDetector
  from ...utils import load_file_from_url
label_desc: Use image node_id 5 for calling the DlibDetector obj's underlying member method code with example usage: obj.reference_y_shift() and returns: int