from
Extracts data from a [MapFlowSession, UntrustworthyData
infix fun <T : Class<out Any>> T.from(session: FlowSession): <Error class: unknown class><FlowSession, T>
Creates a [Pair(session, Class)] from this Class.
infix fun <T : Any> KClass<T>.from(session: FlowSession): <Error class: unknown class><FlowSession, Class<T>>