def METHOD_NAME() -> None:
    stack_set, builder = round_trip_for(AwsCloudFormationStackSet)
    # stack sets
    assert len(builder.resources_of(AwsCloudFormationStackSet)) == 1
    # stack set instance summaries
    assert len(builder.resources_of(AwsCloudFormationStackInstanceSummary)) == 2
    # deferred edges to stack set instances
    assert len(builder.graph.deferred_edges) == 2