code: def get_backbones():
      is_travis = os.environ.get("TRAVIS", False)
      exclude = ["senet154", "efficientnetb6", "efficientnetb7"]
      backbones = get_available_backbone_names()
  
      if is_travis:
          backbones = [b for b in backbones if b not in exclude]
      return backbones
  
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 1 for calling a global function with example usage: get_backbones() and returns: backbones