AnonymousForumContentMessageImpl
constructor(chat: PreviewForumChat, messageId: MessageId, threadId: MessageThreadId, date: DateTime, forwardInfo: ForwardInfo?, editDate: DateTime?, hasProtectedContent: Boolean, replyTo: Message?, replyMarkup: InlineKeyboardMarkup?, content: T, senderBot: CommonBot?, authorSignature: AuthorSignature?, mediaGroupId: MediaGroupIdentifier?)