By default does not support multiple emits per nextToken invocation
for efficiency reasons. Subclass and override this method, nextToken,
and getToken (to push tokens into a list and pull from that list
rather than a single variable as this implementation does).
By default does not support multiple emits per nextToken invocation for efficiency reasons. Subclass and override this method, nextToken, and getToken (to push tokens into a list and pull from that list rather than a single variable as this implementation does).