public String toJson(ObjectMapper mapper) {
ObjectNode rootNode = mapper.createObjectNode();
ArrayNode keysNode = rootNode.putArray("keys");
for (Object key : keys) {
keysNode.addPOJO(key);
}
try {
return mapper.writeValueAsString(rootNode);
} catch (Exception e) {
throw Exceptions.propagate(e);
}
}
