add
abstract suspend fun addListItem(listSidOrUniqueName: String, itemData: <Error class: unknown class>): SyncList.Item
Add Item to the SyncList without opening it.
Return
SyncList.Item which has been added.
Parameters
list
SID or unique name of existing SyncList.
item
Item data to add as a JsonObject.
Throws
Twilio
When error occurred while setting the Item.