code: def _funcproto(args, ret):
      """Simple temporary type constructor for funcproto"""
      return ct.Function(*chain(args, (ret,)))
  
file_path: datashader/datashader/datashape/type_symbol_table.py
imports: from __future__ import absolute_import, division, print_function
  import ctypes
  from itertools import chain
  from .None import coretypes
label_desc: Use image node_id 3 for calling a global function with example usage: _funcproto(args, ret) and returns: ct