apollo-common/src/main/java/com/ctrip/framework/apollo/common/dto/GrayReleaseRuleItemDTO.java/GrayReleaseRuleItemDTO/labelMatches
class GrayReleaseRuleItemDTO:  private boolean labelMatches(String clientLabel) {
    return this.clientLabelList.contains(ALL_Label) || clientLabelList.contains(clientLabel);
  }