def METHOD_NAME():
    defs = Defs()
    suite = defs.add_suite("test_get_all")
    node_vec = suite.get_all_nodes()
    assert len(node_vec) == 1, "Expected one nodes but found " + str(len(node_vec))
    fam1 = suite.add_family("f1")
    fam2 = suite.add_family("f2")
    fam3 = suite.add_family("f3")
    node_vec = suite.get_all_nodes()
    assert len(node_vec) == 4, "Expected 4 nodes but found " + str(len(node_vec))
    node_vec = fam1.get_all_nodes()
    assert len(node_vec) == 1, "Expected 1 nodes but found " + str(len(node_vec))
    f1_t1 = fam1.add_task("t1") 
    f1_t2 = fam1.add_task("t2") 
    node_vec = fam1.get_all_nodes()
    assert len(node_vec) == 3, "Expected 3 nodes but found " + str(len(node_vec))
    node_vec = f1_t1.get_all_nodes()
    assert len(node_vec) == 1, "Expected 1 nodes but found " + str(len(node_vec))
    node_vec = suite.get_all_nodes()
    assert len(node_vec) == 6, "Expected 6 nodes but found " + str(len(node_vec))
    print("test_get_all_nodes_from_nodes PASSED")