pub fn launch_formation(
roster: &AdmittedRoster,
options: FormationLaunchOptions,
) -> Result<RunningFormation, MemberLaunchFailure>Expand description
Start every peer of roster at once and wait for each door to answer.
On success the peers are running and ready, and the entry member is not yet started: the caller
announces the formation, then calls RunningFormation::start_entry. On failure nothing this
started is still running.