}

    private static class FilteredTree {
        private final String root;
        private final PatternSet patterns;

        private FilteredTree(String root, PatternSet patterns) {
            this.root = root;
            this.patterns = patterns;
        }

        public String getRoot() {

        );
    }

    private static class FilteredTree {
        private final String root;
        private final PatternSet patterns;

        private FilteredTree(String root, PatternSet patterns) {
            this.root = root;
            this.patterns = patterns;
        }

        public String getRoot() {

            task incomingDependencies { dependsOn configurations.compile.incoming.dependencies }
            task copy { inputs.files configurations.compile.copy() }
            task filteredTree { inputs.files configurations.compile.asFileTree.matching { true } }
'''

        when: