class_docstr: Preprocessor for object detector.
class_docstr_tok: ["Preprocessor","for","object","detector","."]
code: def anchor_boxes(self):
      return self._anchor_boxes
  
file_path: mediapipe/mediapipe/model_maker/python/vision/object_detector/preprocessor.py
imports: from typing import Any, Mapping, Tuple
  import tensorflow
  from mediapipe.model_maker.python.vision.object_detector import model_spec
  from official.vision.dataloaders import utils
  from official.vision.ops import anchor
  from official.vision.ops import box_ops
  from official.vision.ops import preprocess_ops
label_desc: Use image node_id 2 for calling the Preprocessor obj's underlying member method code with example usage: obj.anchor_boxes() and returns: self