private static String getExportedPackages(String argument) throws IOException {
        if (argument.startsWith(REPLACE_VERSION_PREFIX)) {
            String jarFile = argument.substring(REPLACE_VERSION_PREFIX.length());
            return readExportHeader(jarFile);
        } else {
            return readExportHeader(argument);
        }
    }
@author Simon Thoresen Hult
@author gjoranv
jdisc_core/src/main/java/com/yahoo/jdisc/core/ExportPackages.java