public void build() {
   if (loopbackQuery.gsonBuilder == null) {
     loopbackQuery.gsonBuilder = new GsonBuilder().setPrettyPrinting();
   }
   loopbackQuery
       .gsonBuilder
       .registerTypeAdapter(Where.class, new WhereSerializer())
       .registerTypeAdapter(Query.Value.class, new ValueSerializer());
   gson = loopbackQuery.gsonBuilder.create();
   Query.setGson(gson);
 }
 public static void setGsonBuilder(GsonBuilder builder) {
   loopbackQuery.gsonBuilder = builder;
 }