GraphConflictResolutionPolicy policy;
    MetadataGraphEdge e1;
    MetadataGraphEdge e2;
    MetadataGraphEdge e3;

    // ------------------------------------------------------------------------------------------
    @BeforeEach
    void setUp() throws Exception {
        policy = new DefaultGraphConflictResolutionPolicy();
        e1 = new MetadataGraphEdge("1.1", true, null, null, 2, 1);