This exception is provided to support Object>>doesNotUnderstand:.

	exceptionDescription
	isResumable message messageText receiver

	exceptionBuilder	top
	message:

	exceptionDescription	top
	isResumable Determine whether an exception is resumable.
	message Answer the selector and arguments of the message that failed.
	messageText Return an exception's message text.
	receiver Answer the receiver of the message that failed.