code: def test_option_cmsis_path():
      """Test project API without CMSIS_PATH environment variable."""
      cmsis_path = os.environ.get("CMSIS_PATH", None)
      del os.environ["CMSIS_PATH"]
      build_project_api("zephyr")
      os.environ["CMSIS_PATH"] = cmsis_path
  
imports: import os
  import tvm
  from .utils import build_project_api
label_desc: Use image node_id 1 for calling a global function with example usage: test_option_cmsis_path() without return types