pub fn tag(&self) -> SummaryDiffTag {
        match self {
            SummaryDiffStatus::Added { .. } => SummaryDiffTag::Added,
            SummaryDiffStatus::Removed { .. } => SummaryDiffTag::Removed,
            SummaryDiffStatus::Modified { .. } => SummaryDiffTag::Modified,
        }
    }
Returns the tag for this status.

The tag is similar to this enum, except it has no associated data.
guppy-summaries/src/diff.rs