Function forceCompleteIfChannelsEmpty

forceCompleteIfChannelsEmpty(
    output: unknown,
    fallback: StepMovement<any>,
    ...channels: readonly (Channel<unknown> | ChannelMap<unknown>)[],
): StepDecision
Completes only when selected Channels are empty, otherwise schedules a fallback.
Parameters
- output: unknown
  Codec-supported completion result.
- fallback: StepMovement<any>
  Movement used when any selected Channel is non-empty.
- ...channels: readonly (Channel<unknown> | ChannelMap<unknown>)[]
  Registered Channel definitions to inspect.
Returns StepDecision
A conditional force-completion decision.