spawnTab behaviour

[componhead]

Hi.
As a working example:

{
      key = 'r',
      mods = mod.LEADER,
      action = act.PromptInputLine({
         description = 'Enter new name for tab',
         action = wezterm.action_callback(function(window, pane, line)
            if line then
                window:active_tab():set_title(line)
            end
         end),
      }),
   },

how can I do that?

 {
      key = 'r',
      mods = mod.LEADER,
      action = act.PromptInputLine({
         description = 'Enter new name for tab',
         action = wezterm.action_callback(function(window, pane, line)
            local tab, pane, window = window:spawn_tab('CurrentPaneDomain')   <-- something like that
            if line then
                tab:set_title(line)
            end
         end),
      }),
   },

Is it possible to chain callbacks? How?
Thank you very much.