fn query_summaries(
spec: &PackageIdSpec,
registry: &mut PackageRegistry<'_>,
source_ids: &RegistrySourceIds,
) -> CargoResult<(Vec<IndexSummary>, Option<String>)>fn query_summaries(
spec: &PackageIdSpec,
registry: &mut PackageRegistry<'_>,
source_ids: &RegistrySourceIds,
) -> CargoResult<(Vec<IndexSummary>, Option<String>)>