CallInviteContent

fun CallInviteContent(    @Json(name = "call_id") callId: String?,     @Json(name = "party_id") partyId: String? = null,     @Json(name = "offer") offer: CallInviteContent.Offer?,     @Json(name = "version") version: String?,     @Json(name = "lifetime") lifetime: Int?,     @Json(name = "invitee") invitee: String? = null,     @Json(name = "capabilities") capabilities: CallCapabilities? = null)