ember-cli-selectize: Mutliselect with server side filtering

Could someone please provide an example how to achieve a server side filtered multiselect in Ember.js using ember-cli-selectize?

I got the multiselect working but my selection dataset includes >3500 items, so my application is slowed down.

In ember-cli-selectize there is an option "filter" but I don't know how to use it.

http://ift.tt/1uys3TV