Method add_change

backend/src/git/index.rs:598–613

(
        &mut self,
        repo_id: RepoId,
        client: &Client,
        change: &activity::Change,
    )

    }

    pub fn add_change(
        &mut self,
        repo_id: RepoId,
        client: &Client,
        change: &activity::Change,
    ) -> Result<()> {
        for id in change.ids() {
            let activity = self.id_activity(client, repo_id, id)?;
            activity.add(change.to_reference());
        }

        let set = self.repo_changes.entry(repo_id).or_default();
        set.insert(change.to_owned());

        Ok(())
    }

    pub fn id_activity(
        &mut self,