code: private void onDiscriminatorColumn(ThriftRow tr, long timestamp, EntityType entityType)
      {
          String discrColumn = ((AbstractManagedType) entityType).getDiscriminatorColumn();
          String discrValue = ((AbstractManagedType) entityType).getDiscriminatorValue();
  
          // No need to check for empty or blank, as considering it as valid name
          // for nosql!
          if (discrColumn != null && discrValue != null)
          {
              Column column = prepareColumn(PropertyAccessorHelper.getBytes(discrValue),
                      PropertyAccessorHelper.getBytes(discrColumn), timestamp, 0);
              tr.addColumn(column);
          }
      }
docs: On discriminator column.
  
  @param tr
  the tr
  @param timestamp
  the timestamp
  @param entityType
  the entity type