"Policy to use to to force compilation for executed call targets before persisting the engine. Possible values are:%n - \'none\': No compilations will be persisted and existing compilations will be invalidated.%n - \'compiled\': No compilations will be forced but finished compilations will be persisted.%n - \'hot\': (default) All started compilations will be completed and then persisted.%n - \'aot\': All started and AOT compilable roots will be forced to compile and persisted.%n - \'executed\': All executed and all AOT compilable roots will be forced to compile."