code: def __getitem__(self, item: Union[slice, str]):
      if isinstance(item, slice):
          select = StepSelect(item.start, item.stop)
          inds = [
              Indicator(
                  ind.key,
                  ind.class_,
                  ind.uuid,
                  ind.props,
                  select=select,
                  is_mean=ind.is_mean,
              )
              for ind in self._indicators
          ]
          return IndicatorCollection(inds)
      elif isinstance(item, str):
          inds = [
              ind
              for ind in self._indicators
              if is_pattern_match(ind.key, item)
          ]
          return IndicatorCollection(inds)
      else:
          raise ValueError(item)
  
imports: from enum import Enum
  from pathlib import Path
  from typing import List, Optional, Tuple, NamedTuple, Dict, Union
  from labml import lab
  from labml.internal import util
  from labml.internal.experiment.experiment_run import RunInfo
  from labml.internal.util.strings import is_pattern_match
label_desc: Use image node_id 8 for calling the IndicatorCollection obj's underlying member method code with example usage: obj.__getitem__(item) and returns: IndicatorCollection, IndicatorCollection