Is there an importable function to convert a javascript object to a query string?

Is there a function I can import for converting a plain javascript hash/object into a query string?

So, here are the requirements:

• Cannot be based on jQuery (I need fastboot support)
• Must support nested objects & arrays.
• Must be built into Ember framework (no plugins)

I'm not really wanting to have another plugin dependency, since I know this is done internally in Ember.