code: def write_known():
      raise NotImplementedError
      datafiles.write_known(
          decls, IGNORED_FILE, ["unsupported"], relroot=REPO_ROOT
      )
  
imports: import os.path
  from c_common.clsutil import classonly
  from c_parser.info import KIND, Declaration, TypeDeclaration, Member, FIXED_TYPE
  from c_parser.match import is_pots, is_funcptr
  from c_analyzer.match import is_system_type, is_process_global, is_fixed_type, is_immutable
  import c_analyzer
  import c_analyzer.info
  import c_analyzer.datafiles
  from .None import _parser, REPO_ROOT
label_desc: Use image node_id 2 for calling a global function with example usage: write_known() without return types