Function banyan_utils::dump::graph

pub fn graph<TT, V, R>(
    forest: &Forest<TT, R>, 
    tree: &Tree<TT, V>, 
    out: impl Write
) -> Result<()> where
    TT: TreeTypes,
    V: Clone + Send + Sync + Debug + DagCbor + 'static,
    R: ReadOnlyStore<TT::Link> + Clone + Send + Sync + 'static,