oriolo on "How to use get_sidebar in plugin folder?"

I've created the plugin that adds custom post type and custom taxonomies for this post type. Templates for the post type and the taxonomies are located in plugin folder.

Now I need to add sidebar for the post type and taxonomies pages. I've tried to use the following code for sidebar:

function mytype_get_sidebar($mytype_sidebar) {
// load sidebar template
if (file_exists(plugin_dir_path(__FILE__) . '/sidebar-mytype.php'))
    return plugin_dir_path(__FILE__) . '/sidebar-mytype.php';

// Default return
return $mytype_sidebar;
}
add_filter('get_sidebar', 'mytype_get_sidebar');

And then on the page where the sidebar should be:

get_sidebar ( apply_filters( 'mytype_get_sidebar', '' ) );
But it doesn't work. var_dump returns NULL:

$my = get_sidebar ( apply_filters( 'mytype_get_sidebar', '' ) );
var_dump($my);

Is there any way how to do that?

Thanks in advance.