updateStickerSet property
A sticker set has changed
Implementation
UpdateStickerSet? get updateStickerSet {
  if (this is UpdateStickerSet) {
    return this as UpdateStickerSet;
  }
  return null;
}A sticker set has changed
UpdateStickerSet? get updateStickerSet {
  if (this is UpdateStickerSet) {
    return this as UpdateStickerSet;
  }
  return null;
}