Sometimes it is necessary not to do processing at all. to do so, use Any type:

wildcard = AMA::Entity::Mapper::Type::Any::INSTANCE
type = [Enumerable, T: [Float, Integer, wildcard, NilClass]]

AMA::Entity::Mapper.map(input, type)

Please note that Any doesn’t match nils. If you need to match nils, just add NilClass to type collection.