class SwhGraphTinkerpopProvider extends WebGraphTinkerpopProvider {
    @Override
    public ImmutableGraph load() {
        var graph = SwhBidirectionalImmutableGraph.loadLabelled(...);
        graph.loadCommitAuthors(LoadMethod.MAPPED);
        graph.loadMessages(LoadMethod.MAPPED);
        return graph;
    }

    public Object getProperty(PropertyType p, long nodeId) {
        var graph = (SwhBidirectionalImmutableGraph) this.getGraph();
        switch (p) {
            case COMMIT_AUTHOR:
                return graph.getCommitAuthor(nodeId);
            case COMMIT_MESSAGE:
                return graph.getMessage(nodeId);
        }
    }
}