code: def _is_in_ci():
      ci_name = os.environ.get("CHAINER_CI", "")
      return ci_name != ""
  
file_path: chainer/tests/conftest.py
imports: import os
  import subprocess
  import sys
  from chainer import testing
  from chainer.testing import parameterized
label_desc: Use image node_id 2 for calling a global function with example usage: _is_in_ci() and returns: unknown