flatReplyKeyboard

inline fun flatReplyKeyboard(    resizeKeyboard: Boolean? = null,     oneTimeKeyboard: Boolean? = null,     inputFieldPlaceholder: String? = null,     selective: Boolean? = null,     block: ReplyKeyboardRowBuilder.() -> Unit): ReplyKeyboardMarkup

Factory-function for ReplyKeyboardBuilder, but in difference with replyKeyboard this method will create single-row keyboard