code: def _delete(self, key, shallow=True):
      file_name = os.path.join(self.db_root, key)
      if os.path.exists(file_name):
          self.logger.debug(
              "Deleting local database file %s.", file_name
          )
          util.delete_local_path(file_name, self.db_root, shallow)
  
file_path: studio/studio/db_providers/local_db_provider.py
imports: import os
  import json
  from studio.db_providers.keyvalue_provider import KeyValueProvider
  from studio.storage.storage_handler_factory import StorageHandlerFactory
  from studio.storage.storage_type import StorageType
  from studio.util import util
label_desc: Use image node_id 4 for calling the LocalDbProvider obj's underlying member method code with example usage: obj._delete(key, shallow) without return types