@Optional
    @InputDirectory
    public File getLicensesDir() {
        if (licensesDir.exists()) {
            return licensesDir;
        }

        return null;
    }

    public void setLicensesDir(File licensesDir) {
        this.licensesDir = licensesDir;
    }

    /**
     * Add a rule which will skip SHA checking for the given dependency name. This should be used for