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In Model for the **ShippingV2** need some improvements. In "**RequestedDocumentSpecification**" class, datatype of the attribute _Format_, _NeedFileJoining_, _RequestedDocumentTypes_ should change. Please change this so we can create valid request.

"Source/FikaAmazonAPI/AmazonSpApiSDK/Models/ShippingV2/RequestedDocumentSpecification.cs" Please check Property type from documentations and change it accordingly. for e.g. _Format_ should be accepting string value like. PNG, PDF, etc.