class_docstr: Load proposal pipeline.
  
  Required key is "proposals". Updated keys are "proposals", "bbox_fields".
  
  Args:
      num_max_proposals (int, optional): Maximum number of proposals to load.
          If not specified, all proposals will be loaded.
class_docstr_tok: ["Load","proposal","pipeline",".","Required","key","is","``","proposals","''",".","Updated","keys","are","``","proposals","''",",","``","bbox_fields","''",".","Args",":","num_max_proposals","(","int",",","optional",")",":","Maximum","number","of","proposals","to","load",".","If","not","specified",",","all","proposals","will","be","loaded","."]
code: def __repr__(self):
      return (
          self.__class__.__name__
          + f"(num_max_proposals={self.num_max_proposals})"
      )
  
imports: import os.path
  import mmcv
  import numpy
  import pycocotools.mask
  from mmdet.core import BitmapMasks, PolygonMasks
  from ..builder import PIPELINES
label_desc: Use image node_id 3 for calling the LoadProposals obj's underlying member method code with example usage: obj.__repr__() and returns: unknown