Duplicate property array of models in component; Ember

If I have a store inject in a component property how can I duplicate it so that I can pass it through a promise validation.

I tried duplicating with

var models = this.store;
let models= this.store;

but when I set models in the validation function it only contains the model. If I used the wrong nomenclature let me know. I started a new job in Ember and they all use data filling through components.