Method reverse

atomic-core/src/change/atom.rs:417–425

Create the reverse edge modification. This creates an edge that undoes this modification: - Swaps `previous` and `flag` - Uses the given `introduced_by` for the reverse This is used when computing the inverse of a change.

(&self, introduced_by: H)

    ///
    /// This is used when computing the inverse of a change.
    pub fn reverse(&self, introduced_by: H) -> Self {
        NewEdge {
            previous: self.flag,
            flag: self.previous,
            from: self.from.clone(),
            to: self.to.clone(),
            introduced_by,
        }
    }

    /// Convert to use `Option<H>` for change references.
    pub fn to_option(&self) -> NewEdge<Option<H>> {