def load_plugins(self, plugins):
        """
        Loads plugins that match the `Plugin` interface and are instantiated.

        :param plugins: A list of plugin instances.
        """

        def instantiate(plugin):
            return plugin() if inspect.isclass(plugin) else plugin

        loaded_plugins = []
        plugins_seen = []

        # Iterate over plugins in reverse to permit users to override default
        # plugin config
        for plugin in reversed(plugins):
            if not is_plugin(plugin) or plugin.name in plugins_seen:
                continue
            # Build the plugins list in reverse to restore original order
            loaded_plugins.insert(0, instantiate(plugin))
            plugins_seen.append(plugin.name)

        return loaded_plugins
Loads plugins that match the `Plugin` interface and are instantiated.

        :param plugins: A list of plugin instances.