flatReplyKeyboard
inline fun flatReplyKeyboard(resizeKeyboard: Boolean? = null, oneTimeKeyboard: Boolean? = null, inputFieldPlaceholder: String? = null, selective: Boolean? = null, persistent: Boolean? = null, block: <Error class: unknown class><<Error class: unknown class>>.() -> Unit): <Error class: unknown class>
Factory-function for ReplyKeyboardBuilder, but in difference with replyKeyboard this method will create single-row keyboard