code: def build_parser(self, context):
          
          context.parser, context.max_level = self._create_parser(context)
docs: Create the final argument parser.
  
          This method creates the non-early (full) argparse argument parser.
          Unlike the early counterpart it is expected to have knowledge of
          the full command tree.
  
          This method relies on ``context.cmd_tree`` and produces
          ``context.parser``. Other ingredients can interact with the parser
          up until :meth:`parse()` is called.