IncrementalSwiftAppWithCppDep getApplication() {
        return main
    }

    String getExpectedOutput() {
        return main.expectedOutput
    }

    IncrementalCppGreeter getLibrary() {
        return lib
    }

    String getAlternateLibraryOutput() {
        return main.expectedAlternateOutput
    }

    class IncrementalCppGreeter extends IncrementalCppElement {

    IncrementalCppAppWithDep getExecutable() {
        return main
    }

    String getExpectedOutput() {
        return main.expectedOutput
    }

    IncrementalCppLib getLibrary() {
        return lib
    }

    class IncrementalCppLib extends IncrementalCppElement {
        final greeter = new CppGreeter()
        final sum = new CppSum()

    @Override
    public NativeLibrarySpec getComponent() {
        return getComponentAs(NativeLibrarySpec.class);
    }

    @Override
    public NativeLibrarySpec getLibrary() {
        return getComponentAs(NativeLibrarySpec.class);
    }

    protected boolean hasSources() {
        for (LanguageSourceSet sourceSet : getInputs()) {
            if (!sourceSet.getSource().isEmpty()) {

        } else {
            getEntryAttributes().remove(ATTRIBUTE_JAVADOC_LOCATION);
        }
    }

    public FileReference getLibrary() {
        return library;
    }

    public void setLibrary(FileReference library) {
        this.library = library;
        setPath(library.getPath());
    }

    @Nullable
    public ModuleVersionIdentifier getModuleVersion() {

    void writeSources(TestFile mainSourceDir, TestFile librarySourceDir, TestFile greetingsLibrarySourceDir) {
        getExecutable().writeSources(mainSourceDir)
        getLibrary().writeSources(librarySourceDir)
        getGreetingsHeader().writeToDir(greetingsLibrarySourceDir)
        for (SourceFile sourceFile : greetingsSources) {
            sourceFile.writeToDir(greetingsLibrarySourceDir)
        }

        } else {
            return Collections.emptyMap();
        }
    }

    private Map<String, Object> createDeploymentAttribute(AbstractLibrary entry) {
        File file = entry.getLibrary().getFile();
        if (!isUtilityProject) {
            if (rootConfigFiles.contains(file)) {
                return ImmutableMap.of(AbstractClasspathEntry.COMPONENT_DEPENDENCY_ATTRIBUTE, "/");