How to structure multiple bids from a bidder in stored request

[jarrettabello]

I am trying to figure out how to structure an openRTB Stored Request object that includes multiple bid objects for a single bidder. This is required in cases where an SSP will only allow a single size per set of parameters and an ad unit supports more than one size. This obviously is not an issue in prebid.js because the bidder object is an array but with bidders being keys that have to be unique. I would appreciate any guidance here!