- iOS 7.0+
- macOS 10.10+
- Mac Catalyst 13.0+
- tvOS 10.0+
An instance containing the message to send.
An array of peer ID instances representing the peers that should receive the message.
The transmission mode to use (reliable or unreliable delivery).
This method is asynchronous (nonblocking).
On the recipient device, the session instance calls its delegate instance’s
session(_: method with the message after it has been fully received.