# Class type Uq_engines.serializer_t

    class type ['a] serializer_t = object .. end

A serializer queues up engines, and starts the next engine when the previous one finishes.

    method serialized : (Unixqueue.event_system -> 'a engine) -> 'a engine

`let se = serialized f`: Waits until all the previous engines reach a final state, and then runs `e = f esys`.

`se` enters a final state when `e` does.