PackageSet removePackages(List<String> packageNames) {
            return new PackageSet(packages.stream()
                                          .filter(p -> ! packageNames.contains(p.packageName))
                                          .toList());
        }
Integration tests for {@link ExportPackages}.

@author gjoranv
jdisc_core/src/test/java/com/yahoo/jdisc/core/ExportPackagesIT.java