Brought in

The ‘princess' style was capable of cinsiderable variety, one of the most popular of which was the polonaise, sometimes buttoned all down the front. The popularity of Dickens's Barnaby Rudge brought in the ‘dolly Varden' dress. It was usually of brightly patterned chintz or cretonne, and was fondly imagined by its wearers to be some kind of eighteenth century costume.

can you explain the sentence which is written in bold.