apollo-portal/src/main/java/com/ctrip/framework/apollo/openapi/util/OpenApiBeanUtils.java/OpenApiBeanUtils/transformFromGrayReleaseRuleDTO
class OpenApiBeanUtils:  public static OpenGrayReleaseRuleDTO transformFromGrayReleaseRuleDTO(
      GrayReleaseRuleDTO grayReleaseRuleDTO) {
    Preconditions.checkArgument(grayReleaseRuleDTO != null);

    return BeanUtils.transform(OpenGrayReleaseRuleDTO.class, grayReleaseRuleDTO);
  }