thechiselgroup/biomixer — comment on commit 547345e1c49b564ac862a9e19d25018bd6cdecf0
File: jretest/org/thechiselgroup/biomixer/client/visualization_component/graph/layouts/VerticalTreeLayoutTest.java line 36
By lgrammel:

I wonder if writing a GraphLayoutCallback stub implementation & using Mockito.spy on it might be clearer?