Drupal Migrate V2 and Addressfield

While trying to migrate data from a legacy CakePHP system to Drupal 7 recently I had a problem getting an Addressfield field to play nicely.What I had origianly was this (which did not work). $this->addFieldMapping('field_customer_address:thoroughfare', 'address'); $this->addFieldMapping('field_customer_address:locality', 'suburb');.....