docs: public static String getLicenseAgreement(final JarFile jar, final Map<String, String> manifestAttrs) {
          String licenseAgreement = null;
  
          if (manifestAttrs.isEmpty()) {
              return licenseAgreement;
          }
  
          String licenseAgreementPrefix = manifestAttrs.get(ArchiveUtils.LICENSE_AGREEMENT);
  
          LicenseProvider licenseProvider = (licenseAgreementPrefix != null) ? ZipLicenseProvider.createInstance(jar, licenseAgreementPrefix) : null;
  
          if (licenseProvider != null)
              licenseAgreement = new InstallLicenseImpl("", LicenseType.UNSPECIFIED, licenseProvider).getAgreement();
  
          return licenseAgreement;
      }