setCustomEmojiStickerSetThumbnail
suspend fun <Error class: unknown class>.setCustomEmojiStickerSetThumbnail(stickerSetName: <Error class: unknown class>, customEmojiId: <Error class: unknown class>)
suspend fun <Error class: unknown class>.setCustomEmojiStickerSetThumbnail(stickerSet: <Error class: unknown class>, customEmojiId: <Error class: unknown class>)