code: def _nccl_available():
      if not HOROVOD_AVAILABLE:
          return False
  
      try:
          return nccl_built()
      except AttributeError:
          return False
      except RuntimeError:
          return False
  
file_path: ludwig/tests/integration_tests/test_horovod.py
imports: import json
  import os
  import platform
  import shlex
  import subprocess
  import sys
  import pytest
  import torch
  from ludwig.constants import ENCODER, TYPE
  from tests.integration_tests.utils import category_feature, ENCODERS, generate_data, sequence_feature
label_desc: Use image node_id 1 for calling a global function with example usage: _nccl_available() and returns: False, nccl_built, False, False