code: def _check_version(version):
      if version not in [(1, 0), (2, 0), (3, 0), None]:
          msg = "we only support format version (1,0), (2,0), and (3,0), not %s"
          raise ValueError(msg % (version,))
  
imports: import io
  import os
  import pickle
  import warnings
  import numpy
  from numpy.lib._utils_impl import drop_metadata
label_desc: Use image node_id 1 for calling a global function with example usage: _check_version(version) without return types