code: protected void setupDefaultSettings(GsonBuilder builder) {
          registerStringAdapter(builder);
          registerNumberAdapter(builder);
          registerJava8TimeAdapter(builder);
          registerBooleanAdapter(builder);
          registerCollectionAdapter(builder);
          registerDBFluteAdapter(builder);
          registerUtilDateFormat(builder);
          setupFieldPolicy(builder);
          setupYourCollectionSettings(builder);
          setupYourScalarSettings(builder);
          setupYourUltimateSettings(builder);
      }
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