Symbol vs string keys in Spree::Order.build_from_api

I noticed in this file https://github.com/spree/spree/blob/2-1-stable/api/app/models/spree/order_decorator.rb#L100

String keys are used on the adjustments hash but just a few lines above for other hashes symbols are used.  This bit me using the new hash syntax and invoking this method.  Would it be worthwhile to throw a `symbolize_keys` in there or something else to make these methods consistent?