MessagePollContent

fun MessagePollContent(    msgType: String = MessageType.MSGTYPE_POLL_START,     @Json(name = "body") body: String = "",     @Json(name = "m.relates_to") relatesTo: RelationDefaultContent? = null,     @Json(name = "m.new_content") newContent: Content? = null,     @Json(name = "org.matrix.msc3381.poll.start") unstablePollCreationInfo: PollCreationInfo? = null,     @Json(name = "m.poll.start") pollCreationInfo: PollCreationInfo? = null)