Old: extend public bool checkAndSnoozePHint(str key) { New: extend public bool checkAndSnooze(str key, timespan duration=timespan(0), bool createIfNecessary=true, int delayToVisitNo=-1) : null=true { Old: extend public void snoozePHint(str key) { New: extend public bool snooze(str key) : null=false { Old: extend public void unsnoozePHint(str key) { New: extend public bool unsnooze(str key) : null=false {