code: def go_struct_main(
      package: str, file: str, line: int, imports: Optional[str]
  ) -> None:
      assert package is not None, "GOPACKAGE not set"
      assert file is not None, "GOFILE not set"
      assert line is not None, "GOLINE not set"
  
      def fmt_import(imp: str) -> str:
          """Turn e.g. `k8sV1:k8s.io/api/core/v1` into `k8sV1 "k8s.io/api/core/v1"`."""
          if ":" in imp:
              return imp.replace(":", ' "') + '"'
          else:
              return '"' + imp + '"'
  
      imports_list = []
      if imports is not None:
          imports_list = [
              fmt_import(i) for i in imports.split(",") if i
          ]
  
      output, lines = gen_go_struct(package, file, line, imports_list)
  
      maybe_write_output(lines, output)
  
imports: import argparse
  import json
  import os
  import re
  import sys
  from typing import List, Optional, Tuple
label_desc: Use image node_id 16 for calling a global function with example usage: go_struct_main(package, file, line, imports) and returns: unknown, unknown