RRuleSet
class RRuleSet extends RRule { }
constructor(noCache?: boolean);
private _dtstart?;
private _tzid?;
readonly _exdate: Date[];
readonly _rdate: Date[];
dtstart: any;
tzid: any;
_iter<M extends QueryMethodTypes>(iterResult: IterResult<M>): IterResultType<M>;
clone(): RRuleSet;
exdate(date: Date): void;
exdates(): Date[];
rdate(date: Date): void;
rdates(): Date[];
toString(): string;
valueOf(): string[];