code: def datadir():
      basedir = Path(this_file_dir()) / "models"
      return _Datadir(basedir)
  
file_path: OMLT/tests/conftest.py
imports: from pathlib import Path
  import numpy
  import pytest
  from pyomo.common.fileutils import this_file_dir
  from omlt.neuralnet.layer import DenseLayer, InputLayer
  from omlt.neuralnet.network_definition import NetworkDefinition
label_desc: Use image node_id 2 for calling a global function with example usage: datadir() and returns: _Datadir