> 2. Consumers, not producers should decide what their assumptions are. Producers should decide what their guarantees are. Issue with schema definition languag

> 2. Consumers, not producers should decide what their assumptions are. Producers should decide what their guarantees are. Issue with schema definition languages is that only one set classes is generated. Forcing consumers to create large amounts of mapping logic to transform input to objects with required assumptions. I like the idea of an array of required fields on the schema of an object. Using arrays of required fields, could be used to generate different set of classes. That would make writing near-duplicate classes of input objects and mapping logic unnecessary.