private ComponentGraph buildGraph(Class<?> componentClass) {
        String commonComponentId = "component";
        ComponentGraph g = new ComponentGraph();
        g.add(mockComponentNode(componentClass, commonComponentId, commonComponentId));
        g.complete();
        return g;
    }
@author gjoranv
@author Tony Vaagenes
@author ollivir
container-core/src/test/java/com/yahoo/container/di/componentgraph/core/ReuseComponentsTest.java