How to access multi selection via bind?

I have a grid with a selection model with mode: 'MULTI'. The selection should be bound to the view model. I've seen this example: http://ift.tt/1BIgNtn

1. Am I right, that 'selectedCustomer' in the example above is an automagically created data entry in the view model based on the scheme 'selected<ModelName>'? At least I can access this value when calling this.get('selectedCustomer') in the view model.

2. How can I access multiple selected customers in my view model when my grid supports multiselection?

Thank you!

How to access multi selection via bind?