message: values can be nested arrays of the generic type
diff: @@ -51,12 +51,12 @@ export class Sequence<ValueType = any> extends ToneEvent<ValueType> {
  /**
  * private reference to all of the sequence proxies
  */
  - private _events: ValueType[] = [];
  + private _events: SequenceEventDescription<ValueType> = [];
  /**
  * The proxied array
  */
  - private _eventsArray: ValueType[] = [];
  + private _eventsArray: SequenceEventDescription<ValueType> = [];
  /**
  * @param callback The callback to invoke with every note
  