class_docstr: Give access to files in the `models` directory.
code: def __init__(self, basedir):
      self._basedir = 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 1 to create a new _Datadir object  with example: obj = _Datadir(basedir)