code: def _concatenate_getitem(self, parameters):
      if parameters == ():
          raise TypeError("Cannot take a Concatenate of no types.")
      if not isinstance(parameters, tuple):
          parameters = (parameters,)
      if not isinstance(parameters[-1], ParamSpec):
          raise TypeError(
              "The last parameter to Concatenate should be a "
              "ParamSpec variable."
          )
      msg = "Concatenate[arg, ...]: each arg must be a type."
      parameters = tuple(typing._type_check(p, msg) for p in parameters)
      return _ConcatenateGenericAlias(self, parameters)
  
imports: import abc
  import collections
  import collections.abc
  import operator
  import sys
  import types
  import typing
label_desc: Use image node_id 8 for calling a global function with example usage: _concatenate_getitem(parameters) and returns: _ConcatenateGenericAlias