code: def _set_class_ndarray(cls):
      global _CLASS_NDARRAY
      _CLASS_NDARRAY = cls
  
file_path: dgl/python/dgl/_ffi/_ctypes/ndarray.py
imports: from __future__ import absolute_import
  import ctypes
  from ..base import _LIB, c_str, check_call
  from ..runtime_ctypes import DGLArrayHandle
  from .types import _return_handle, _wrap_arg_func, C_TO_PY_ARG_SWITCH, RETURN_SWITCH
label_desc: Use image node_id 5 for calling a global function with example usage: _set_class_ndarray(cls) without return types