code: public T withBeanValidator(javax.validation.Validator validator) {
          if (validator != null) {
              configMap.put(BEAN_VALIDATION_VALIDATOR, validator);
              configMap.put(BEAN_VALIDATION_ENABLE, true);
          }
          return getThis();
      }
docs: Provide custom validator for Bean Validation (JSR303)
  
  @return ManagerFactoryBuilder
  @see <a href="https://github.com/doanduyhai/Achilles/wiki/Configuration-Parameters#bean-validation" target="_blank">Bean validation</a>