ReadonlyclassThe class used to create this instance, so that it can be recognized as valid without an instanceof check.
The task (or data) this stackable holds.
The stackable below this one, or null when this is the bottom.
Run the stacked task.
StaticfromStaticmakeMake a new Stackable from the data given if it is not already a valid Stackable.
Return a valid Stackable instance from given data, or even an already valid one.
Provide the type of IsLinker to use.
Stackable represents a runnable entry in stack.