code: def c_sub_decl(name, return_type, args):
      args = make_c_args(args)
      return c_sub_template.format(
          name=name, upname=name.upper(), args=args
      )
  
imports: from collections import defaultdict
  from operator import itemgetter
  import os
  from stat import ST_MTIME
  import argparse
label_desc: Use image node_id 18 for calling a global function with example usage: c_sub_decl(name, return_type, args) and returns: c_sub_template