This class is private to the EHS implementation. Its use allows for ensured execution to survive code such as:

[self doThis.
^nil]
ensure: [self doThat]

Signaling or handling this exception is not recommended.

	exceptionDescription
	defaultAction isResumable

	accessing	top
	result
	result:

	exceptionDescription	top
	defaultAction The current computation is terminated. The cause of the error should be logged or reported to the user. If the program is operating in an interactive debugging environment the computation should be suspended and the debugger activated.
	isResumable Determine whether an exception is resumable.