def start(events):
    """
    generate the d3_tree_v2_graph with events (using d3_tree_v1_graph)

    Args:
        events: events

    Returns:
        a graph in HTML
    """
    from nettacker.lib.graph.d3_tree_v1.engine import start

    return start(events).replace(
        """\t root.children.forEach(function(child){
     collapse(child);
\t });""",
        "",
    )