code: def _format_string_dtype():
      return "object" if get_string_dtype() is object else "string"
  
imports: from __future__ import annotations
  from textwrap import dedent
  import numpy
  import pandas
  import pytest
  import dask.array
  import dask.dataframe
  from dask.dataframe.utils import get_string_dtype, pyarrow_strings_enabled
  from dask.utils import maybe_pluralize
label_desc: Use image node_id 1 for calling a global function with example usage: _format_string_dtype() and returns: unknown