Followed the instructions to add amazon as a custom native network with mopub as the mediator to my android app. Grabbed the AmazonEventBanner.java adapter from here: https://developer.amazon.com/public/resources/development-tools/sdk
Everything looks good except on line Line 141 of the adapter you provided there's an error that AdSize.SIZE_300x50; is missing. According to the release notes you guys removed it in SDK 5.7.2. Is there an updated version of AmazonEventBanner.java that I can use with 5.7.2?