fn derive_host_cause<'db>(
_interner: DbInterner<'db>,
_candidate_kind: ProbeKind<DbInterner<'db>>,
cause: ObligationCause,
_idx: usize,
_parent_host_pred: Binder<'db, HostEffectPredicate<'db>>,
) -> ObligationCausefn derive_host_cause<'db>(
_interner: DbInterner<'db>,
_candidate_kind: ProbeKind<DbInterner<'db>>,
cause: ObligationCause,
_idx: usize,
_parent_host_pred: Binder<'db, HostEffectPredicate<'db>>,
) -> ObligationCause