withContent

inline fun <T : MessageContent> ContentMessage<*>.withContent(): ContentMessage<T>?
inline fun <T : MessageContent> CommonMessage<*>.withContent(): CommonMessage<T>?
inline fun <T : MessageContent> ChannelContentMessage<*>.withContent(): ChannelContentMessage<T>?
inline fun <T : MessageContent> PrivateContentMessage<*>.withContent(): PrivateContentMessage<T>?
inline fun <T : MessageContent> PublicContentMessage<*>.withContent(): PublicContentMessage<T>?
inline fun <T : MessageContent> GroupContentMessage<*>.withContent(): GroupContentMessage<T>?
inline fun <T : MessageContent> CommonGroupContentMessage<*>.withContent(): CommonGroupContentMessage<T>?
inline fun <T : MediaGroupContent> MediaGroupMessage<*>.withContent(): MediaGroupMessage<T>?