code: def _record_collection_retriever(self, step, val, trace):
      assert self.use_list
      if isinstance(val, list):
          sliced_val = self.record_collection_slice(
              val, self.index_slice
          )
          return self._record_collection_to_encodable(
              step, sliced_val, trace
          )
      elif self.index_range.start == 0:
          res = self._record_to_encodable(step, val, trace)
          res["index"] = 0
          return [res]
      else:
          return []
  
imports: import asyncio
  import time
  from typing import Iterable, Iterator, List, Tuple, Union, Optional
  from typing import TYPE_CHECKING
  from aim.web.api.runs.utils import ASYNC_SLEEP_INTERVAL, PROGRESS_KEY_SUFFIX, IndexRange, collect_streamable_data, get_run_props, get_run_params
  from aim.web.configs import AIM_PROGRESS_REPORT_INTERVAL
  from aim.sdk.uri_service import URIService, generate_resource_path
  from aim.sdk.sequence_collection import SequenceCollection
  from aim.sdk.sequence import Sequence
  from aim.storage.treeutils import encode_tree
  from aim.storage.context import Context
label_desc: Use image node_id 10 for calling the CustomObjectApi obj's underlying member method code with example usage: obj._record_collection_retriever(step, val, trace) and returns: self, list, list