for (DependencyGraphNodeResult node : getFirstLevelNodes(dependencySpec)) {
            matches.add(node.getPublicView());
        }
        return matches;
    }

    private Set<DependencyGraphNodeResult> getFirstLevelNodes(Spec<? super Dependency> dependencySpec) {
        Set<DependencyGraphNodeResult> matches = new LinkedHashSet<>();

        @Override
        public SelectedArtifactSet select(ArtifactSelectionSpec spec) {
            return this;
        }

        @Override
        public SelectedArtifactSet select(Spec<? super Dependency> dependencySpec) {
            return this;
        }

        @Override
        public void visitDependencies(TaskDependencyResolveContext context) {
        }

        @Override

    }

    @Override
    public Configuration copy(Closure dependencySpec) {
        return copy(Specs.convertClosureToSpec(dependencySpec));
    }

    @Override
    public Configuration copyRecursive(Closure dependencySpec) {
        return copyRecursive(Specs.convertClosureToSpec(dependencySpec));
    }

    @Override
    public ResolutionStrategyInternal getResolutionStrategy() {

        return dependencySpec;
    }

    /**
     * The dependency spec selects the dependency (or dependencies if multiple matches found) to show the report for.
     * The spec receives an instance of {@link DependencyResult} as parameter.
     */
    public void setDependencySpec(@Nullable Spec<DependencyResult> dependencySpec) {
        this.dependencySpec = dependencySpec;

            // set of build dependencies than actually required. This is because it takes a lot of extra information
            // from the visited graph to properly filter artifacts by dependencySpec, and we don't want capture that when
            // calculating build dependencies.