code: def reset_idx(self):
      self.a1, self.p, self.a2, self.n = None, None, None, None
      self.was_set_externally = False
  
file_path: pytorch-metric-learning/src/pytorch_metric_learning/miners/hdc_miner.py
imports: import math
  import torch
  from ..utils import loss_and_miner_utils
  from .base_miner import BaseMiner
label_desc: Use image node_id 6 for calling the HDCMiner obj's underlying member method code with example usage: obj.reset_idx() without return types