code: def gather_fallbacks(self):
      fallback = {"_log": self.logger}
      for sr_path, subrunner in self.subrunners.items():
          if self.path and is_prefix(self.path, sr_path):
              path = sr_path[len(self.path) :].strip(".")
              set_by_dotted_path(fallback, path, subrunner.config)
          else:
              set_by_dotted_path(fallback, sr_path, subrunner.config)
  
      # dogmatize to make the subrunner configurations read-only
      self.fallback = dogmatize(fallback)
      self.fallback.revelation()
  
imports: import os
  from collections import OrderedDict, defaultdict
  from copy import copy, deepcopy
  from sacred.config import ConfigDict, chain_evaluate_config_scopes, dogmatize, load_config_file, undogmatize
  from sacred.config.config_summary import ConfigSummary
  from sacred.config.custom_containers import make_read_only
  from sacred.host_info import get_host_info
  from sacred.randomness import create_rnd, get_seed
  from sacred.run import Run
  from sacred.utils import convert_to_nested_dict, create_basic_stream_logger, get_by_dotted_path, is_prefix, rel_path, iterate_flattened, set_by_dotted_path, recursive_update, iter_prefixes, join_paths, NamedConfigNotFoundError, ConfigAddedError
  from sacred.settings import SETTINGS
label_desc: Use image node_id 3 for calling the Scaffold obj's underlying member method code with example usage: obj.gather_fallbacks() without return types