XF 2.0 Multiple Column Unique Keys?

[Jaxel]

I know I can make unique keys with:

$table->addUniqueKey('category_id');

But how would I create a multiple column unique key such as:

UNIQUE KEY `stream_id` (`service_id`,`channel_value1`,`channel_value2`)

 

[Mike]

$table->addUniqueKey(['column1, 'column2'], 'index_name');

 

[Jaxel]

Thanks.