OneOfMapping

Specifies a correspondence between statusCode and output.

A single status code can have multiple mappings, with different body content types. The mapping can then be chosen based on content type negotiation, or the content type header.

The appliesTo function should determine, whether a runtime value matches the type O. This check cannot be in general done by checking the run-time class of the value, due to type erasure (if O has type parameters).