startThreadWithMessage
suspend fun startThreadWithMessage(channelId: Snowflake, messageId: Snowflake, request: StartThreadRequest, reason: String? = null): DiscordChannel(source)
suspend fun startThreadWithMessage(channelId: Snowflake, messageId: Snowflake, name: String, archiveDuration: ArchiveDuration, builder: StartThreadWithMessageBuilder.() -> Unit): DiscordChannel(source)