code: private FieldType getFieldType(byte[] data, int offset)
     {
        int fieldIndex = MPPUtility.getInt(data, offset);
        return FieldTypeHelper.mapTextFields(FieldTypeHelper.getInstance14(fieldIndex));
     }
docs: Retrieves a field type from a location in a data block.
  
  @param data data block
  @param offset offset into data block
  @return field type