code: def mocker_validate_args(mocker):
      return mocker.patch(
          "imagededup.utils.plotter._validate_args",
          return_value=PATH_DIR_POSIX,
      )
  
file_path: imagededup/tests/test_plotter.py
imports: import os
  import pytest
  import matplotlib.pyplot
  from pathlib import Path
  import numpy
  from imagededup.utils.plotter import _formatter, _validate_args, plot_duplicates
label_desc: Use image node_id 8 for calling a global function with example usage: mocker_validate_args(mocker) and returns: mocker