code: def _ac_flag(ctx, param, incomplete):
      if incomplete[:1] == "@":
          return _ac_batch_files(ctx, param, incomplete)
      args = click_util.Args(**ctx.params)
      opdef = _opdef_for_opspec(args.opspec)
      if not opdef:
          return []
      flag_vals = _parse_flag_vals(args.flags, opdef, incomplete)
      _apply_resource_flagdefs(opdef, flag_vals)
      if "=" in incomplete:
          return _ac_flag_choices(incomplete, opdef)
      unused_flag_assigns = [
          f"{flag_name}="
          for flag_name in _unused_flags(opdef, flag_vals)
      ]
      return ac_support.ac_nospace(unused_flag_assigns, incomplete)
  
imports: import click
  from guild import click_util
  from .None import ac_support
  from .None import remote_support
label_desc: Use image node_id 4 for calling a global function with example usage: _ac_flag(ctx, param, incomplete) and returns: ac_support, _ac_batch_files, list, _ac_flag_choices