ActivationFile target) {
                final String path = target.getExists();
                final String xformed = transformPath(path, target, "exists");
                return xformed != path ? (builder != null ? builder : creator.get()).exists(xformed) : builder;
            }

            private String transformPath(String path, ActivationFile target, String locationKey) {
                if (isNotEmpty(path)) {

    }

    private void assertPathSuffixEquals(String expected, Object actual) {
        String a = actual.toString();
        a = a.substring(a.length() - expected.length()).replace('\\', '/');
        assertEquals(expected, a);
    }

    private void assertPathWithNormalizedFileSeparators(Object value) {
        assertEquals(new File(value.toString()).getPath(), value.toString());
    }

    }

    public String getDefaultGoal() {
        return getBuild() != null ? getBuild().getDefaultGoal() : null;
    }

    public Plugin getPlugin(String pluginKey) {
        return getBuild().getPluginsAsMap().get(pluginKey);
    }

    /**
     * Default toString
     */
    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder(128);

            @Override
            public String getLocation() {
                return artifact.getId();
            }

            @Override
            public Source resolve(String relative) {
                return null;
            }
        };
    }

    private static String inheritedGroupId(final ModelBuilderResult result, final int modelIndex) {
        String groupId = null;

            String fieldName,
            ModelProblemCollector problems,
            Severity severity,
            Version version,
            String string,
            String sourceHint,
            InputLocationTracker tracker) {
        if (string == null || string.isEmpty()) {
            return true;
        }

        if ("true".equalsIgnoreCase(string) || "false".equalsIgnoreCase(string)) {