receive
open fun <R : Any> receiveAll(receiveType: Class<R>, sessions: List<FlowSession>, maySkipCheckpoint: Boolean = false): List<UntrustworthyData<R>>
Suspends until a message has been received for each session in the specified sessions.
Consider sessions: Map
Remember that when receiving data from other parties the data should not be trusted until it's been thoroughly verified for consistency and that all expectations are satisfied, as a malicious peer may send you subtly corrupted data in order to exploit your code.