code: public static HashMode getPartitionHashColumns(String name, String pkHashConfigs) {
          if (StringUtils.isEmpty(pkHashConfigs)) {
              return null;
          }
  
          List<PartitionData> datas = partitionDatas.get(pkHashConfigs);
          for (PartitionData data : datas) {
              if (data.simpleName != null) {
                  if (data.simpleName.equalsIgnoreCase(name)) {
                      return data.hashMode;
                  }
              } else {
                  if (data.regexFilter.filter(name)) {
                      return data.hashMode;
                  }
              }
          }
  
          return null;
      }
docs: match return List , not match return null