Resolver Array type with key value

[darkiron]

Hi,
I try to resolve a collection as associative array withe key value, I don't know how I do proceed

my query look like:

      Product(
        productId: $productId
 {
        productId
  	  productImages {
          name
        }
    }
}

I expected for productImages:

"MY_KEY_1": {
     name: "image_name"
},
"MY_KEY_2": {
     name: "image_name_2"
},

Thanks for your help