Looks like 4.0 may have broken it about example-thing HOT 1 OPEN

register: function( type, constructor ) {
    views[ type ] = constructor;
}

register: function( type, constructor ) {
    var defaultConstructor = {
        type: type,
        View: {},
        toView: function( content ) {
            var match = wp.shortcode.next( this.type, content );

            if ( ! match ) {
                return;
            }

            return {
                index: match.index,
                content: match.content,
                options: {
                    shortcode: match.shortcode
                }
            };
        }
    };

    constructor = _.defaults( constructor, defaultConstructor );
    constructor.View = wp.mce.View.extend( constructor.View );

    views[ type ] = constructor;
}

View: {
    className: 'editor-thing',
    template:  media.template( 'editor-thing' ),
    initialize: function( options ) {
        this.shortcode = options.shortcode;
    },
    getHtml: function() {
        return this.template( _.defaults(
            this.shortcode.attrs.named,
            thing.defaults
        ) );
    }
},