code: def _select_names(names):
      is_full = os.environ.get("FULL_TEST", False)
      if not is_full:
          return [random.choice(names)]
      else:
          return names
  
file_path: segmentation_models/tests/test_models.py
imports: import os
  import pytest
  import random
  import six
  import numpy
  import segmentation_models
  from segmentation_models import Unet
  from segmentation_models import Linknet
  from segmentation_models import PSPNet
  from segmentation_models import FPN
  from segmentation_models import get_available_backbone_names
label_desc: Use image node_id 2 for calling a global function with example usage: _select_names(names) and returns: list, names