@Documented
@Target(value=TYPE)
@Retention(value=RUNTIME)
@InterfaceAudience.Public
@InterfaceStability.Evolving
public @interface Checkpointable
Contract representing to the framework that the task can be safely preempted
and restarted between invocations of the user-defined function.
This is often true when the result of a function does not rely on state
derived from previous elements in the record stream, but the guarantee is
left as an exercise to the implementor.