ArtifactSpec e = createArtifactSpec("e", "1.0");
        ArtifactSpec c1 = e.addDependency("c", "1.0");
        ArtifactSpec f = c1.addDependency("f", "1.0");

        ArtifactResolutionResult res = collect(createSet(new Object[] {a.artifact, e.artifact}));
        assertEquals(
                createSet(new Object[] {a.artifact, b.artifact, e.artifact, c1.artifact, f.artifact}),
                res.getArtifacts(),

            }
        }

        return location;
    }

    private static boolean equals(String s1, String s2) {
        String c1 = s1 == null ? "" : s1.trim();
        String c2 = s2 == null ? "" : s2.trim();
        return c1.equals(c2);
    }

    private static Severity getSeverity(ModelBuilderRequest request, int errorThreshold) {