WaitSignal
class WaitSignal @InternalWowApi constructor(val format: Int = FORMAT, val waitId: String, val result: CommandResult)
A wait signal: the result one hop reached for the wait waitId, sent to the node that waits. Signals are deduplicated by (waitId, the result's hop and command, its source): the source is the result's CommandResult.function, the context and function that signalled it.
Fields may be added; only Wow builds a signal.