fn gate(
input: &PreflightInput,
candidate: &str,
relocate_only: bool,
steps: &mut Vec<Step>,
) -> Option<(Verdict, Option<String>)>Expand description
The spawn’s resume gate (PersistentSubprocessController::apply_resume_gate_with),
mirrored: a candidate that isn’t the chain head is redirected to the head
when reachable here, else refused. None when the candidate stands.