docs: def _update_versions():
      """Update :attr:`_versions` with the registered plotter methods"""
      for pm_name in plot._plot_methods:
          pm = getattr(plot, pm_name)
          plugin = pm._plugin
          if (plugin is not None and plugin not in _versions and
                  pm.module in sys.modules):
              _versions.update(get_versions(key=lambda s: s == plugin))