}

    @Override
    public ConfigurableFileCollection getGeneratedSourcesDirs() {
        return generatedSourcesDirs;
    }

    @Nullable
    public DirectoryContribution getResourcesContribution() {
        return resourcesContributor;
    }

    /**
     * A mapping from a directory to the task which provides that directory.
     */
    public static class DirectoryContribution {

        DefaultSourceSetOutput output = Cast.uncheckedCast(sourceSet.getOutput());
        DefaultSourceSetOutput.DirectoryContribution resourcesContribution = output.getResourcesContribution();
        if (resourcesContribution != null) {