Module Make.Option
val wrap_model : ?on_action_for_none:(unit, 'model option) on_action_mismatch -> ('input, 'model, 'result) t -> ('input, 'model option, 'result option) tval wrap_model_with_default : ?on_action_for_none:(unit, 'model option) on_action_mismatch -> ('input, 'model, 'result) t -> default:'result -> ('input, 'model option, 'result) t