pub fn resolve_ids<'a>(
        &self,
        feature_ids: impl IntoIterator<Item = impl Into<FeatureId<'a>>>,
    ) -> Result<FeatureSet<'g>, Error> {
        Ok(FeatureSet {
            graph: DebugIgnore(*self),
            core: ResolveCore::from_included::<IxBitSet>(
                self.feature_ixs(feature_ids.into_iter().map(|feature| feature.into()))?,
            ),
        })
    }
Creates a new `FeatureSet` consisting of the specified feature IDs.

Returns an error if any feature IDs are unknown.
guppy/src/graph/feature/resolve.rs