docs: private void addPojoField(final TypeSpec.Builder classBuilder,
                                final MethodSpec.Builder constructorBuilder,
                                final String fieldName,
                                final TypeName fieldClass) {
          classBuilder.addField(fieldClass, fieldName, Modifier.PRIVATE, Modifier.FINAL);
          addGetter(classBuilder, fieldName, fieldClass);
          addConstructorParameter(constructorBuilder, fieldName, fieldClass);
      }