code: def lbp_frontal_face_cascade_filename():
      """Return the path to the XML file containing the weak classifier cascade.
  
      These classifiers were trained using LBP features. The file is part
      of the OpenCV repository [1]_.
  
      References
      ----------
      .. [1] OpenCV lbpcascade trained files
             https://github.com/opencv/opencv/tree/master/data/lbpcascades
      """
  
      return _fetch("data/lbpcascade_frontalface_opencv.xml")
  
imports: import numpy
  import shutil
  from ..util.dtype import img_as_bool
  from ._registry import registry, registry_urls
  from ..None import __version__
  import os.path
  import os
label_desc: Use image node_id 7 for calling a global function with example usage: lbp_frontal_face_cascade_filename() and returns: _fetch