code: def list(
      self, config_path: str, results_filter: Optional[ObjectType]
  ) -> List[str]:
      ret: List[str] = []
      files = self.store.list(config_path)
  
      for file in files:
          self._list_add_result(
              files=ret,
              file_path=f"{config_path}/{file}",
              file_name=file,
              results_filter=results_filter,
          )
      return sorted(list(set(ret)))
  
file_path: hydra/hydra/_internal/core_plugins/structured_config_source.py
imports: import importlib
  import warnings
  from typing import List, Optional
  from hydra.core.config_store import ConfigStore
  from hydra.core.object_type import ObjectType
  from hydra.plugins.config_source import ConfigResult, ConfigSource
label_desc: Use image node_id 7 for calling the StructuredConfigSource obj's underlying member method code with example usage: obj.list(config_path, results_filter) and returns: sorted