final String value = getQueryStringValue("value", String.class, null);
if (model == null) {
model = buildAboutModel(type);
}
if (key != null && value != null) {
model = model.filterPropertyByKeyValue(value, key);
} else if (key != null) {
model = model.filterPropertyByKey(key);
} else if (value != null) {
model = model.filterPropertyByValue(value);
}