1.41.1 Continuation class: instance creation
- Return a continuation.
- currentDo: aBlock
- Pass a continuation to the one-argument block, aBlock and return the
result of evaluating it.
- escapeDo: aBlock
- Pass a continuation to the one-argument block, knowing that aBlock
does not fall off (either because it includes a method return, or
because it yields control to another continuation). If it does,
an exception will be signalled and the current process terminated.