src/vs/workbench/contrib/comments/browser/commentNode.ts/CommentNode/updateTimestamp
class CommentNode:	private updateTimestamp(raw?: string) {
		if (!this._timestamp) {
			return;
		}

		const timestamp = raw !== undefined ? new Date(raw) : undefined;
		if (!timestamp) {
			this._timestampWidget?.dispose();
		} else {
			if (!this._timestampWidget) {
				this._timestampWidget = new TimestampWidget(this.configurationService, this._timestamp, timestamp);
				this._register(this._timestampWidget);
			} else {
				this._timestampWidget.setTimestamp(timestamp);
			}
		}
	}