def get_tab(self, tab_name, allow_disabled=False):
        """Returns a specific tab from this tab group.

        If the tab is not allowed or not enabled this method returns ``None``.

        If the tab is disabled but you wish to return it anyway, you can pass
        ``True`` to the allow_disabled argument.
        """
        tab = self._tabs.get(tab_name, None)
        if tab and tab._allowed and (tab._enabled or allow_disabled):
            return tab
        return None
Returns a specific tab from this tab group.

        If the tab is not allowed or not enabled this method returns ``None``.

        If the tab is disabled but you wish to return it anyway, you can pass
        ``True`` to the allow_disabled argument.