pub fn to_summary_id(&self) -> SummaryId {
        SummaryId {
            name: self.name().to_string(),
            version: self.version().clone(),
            source: self.source().to_summary_source(),
        }
    }
Converts this metadata to a `SummaryId`.

Requires the `summaries` feature to be enabled.
guppy/src/graph/summaries.rs