code: def get_default_storage_prefix(self) -> Optional[str]:
      return None
  
imports: from abc import ABC, abstractmethod
  from pathlib import Path
  import shutil
  from typing import List, Mapping, Optional
  import uuid
  import pytest
  from snakemake import api, settings
  from snakemake_interface_common.utils import lazy_property
  from snakemake_interface_common.plugin_registry.plugin import TaggedSettings
  from snakemake_interface_executor_plugins.settings import ExecutorSettingsBase
  from snakemake_interface_executor_plugins.registry import ExecutorPluginRegistry
  from snakemake_interface_storage_plugins.settings import StorageProviderSettingsBase
label_desc: Use image node_id 2 for calling the TestWorkflowsLocalStorageBase obj's underlying member method code with example usage: obj.get_default_storage_prefix() and returns: None