code: def _load_ffi(ffi, lib_path=_ARROW_DLL):
      os.environ["ARROW_DEBUG_MEMORY_POOL"] = "trap"
      ffi.cdef(_cpp_c_data_entrypoints)
      dll = ffi.dlopen(lib_path)
      dll.ArrowCpp_CDataIntegration_ExportSchemaFromJson
      return dll
  
imports: import contextlib
  import functools
  import os
  import subprocess
  from .None import cdata
  from .tester import Tester, CDataExporter, CDataImporter
  from .util import run_cmd, log
  from ..utils.source import ARROW_ROOT_DEFAULT
label_desc: Use image node_id 1 for calling a global function with example usage: _load_ffi(ffi, lib_path) and returns: dll