class DataTablesParser {

    protected static Map<String, String[]> unprefix(Map<String, String[]> parametersMap, String prefix) {
        ImmutableMap.Builder<String, String[]> builder = ImmutableMap.builder();
        for (Map.Entry<String, String[]> entry : parametersMap.entrySet()) {
            String key = entry.getKey();
            if (key.startsWith(prefix)) {
                builder.put(key.substring(prefix.length()), entry.getValue());
            }
        }

        return builder.build();
    }

}