code: def get_negative_items(self, user_id):
      if "negative_sets" in self._index_store:
          if user_id in self._index_store["negative_sets"]:
              return list(self._index_store["negative_sets"][user_id])
          else:
              return []
      else:
          negative_items = []
          for item_id in range(self._total_items):
              if (
                  item_id
                  not in self._index_store["positive_sets"][user_id]
              ):
                  negative_items.append(item_id)
          return negative_items
  
file_path: openrec/openrec/tf1/utils/dataset.py
imports: import numpy
  import random
label_desc: Use image node_id 7 for calling the Dataset obj's underlying member method code with example usage: obj.get_negative_items(user_id) and returns: negative_items, list, list