code: def _reduce(self):
      assert (
          not self._context_count
      ), "Cannot reduce within with-blocks."
      compact = {}
  
      # skip 1 (default dict)
      for dct in itertools.islice(self._chain, 1):
          compact.update(dct)
  
      self._chain = LinkedList([self._default, compact])
  
imports: import functools
  import inspect
  import itertools
  from operator import attrgetter
  from typing import Any
  from gluonts.pydantic import pydantic, deep_update
label_desc: Use image node_id 3 for calling the Settings obj's underlying member method code with example usage: obj._reduce() without return types