docs: public byte[] getBytes(int columnIndex) {
  		Object fieldValue = data[columnIndex];
  		if (fieldValue == null) {
  			return null;
  		}
  		if (fieldValue instanceof byte[]) {
  			return (byte[]) fieldValue;
  		}
  		throw new DBFException("Unsupported type for byte[] at column:" + columnIndex + " "
  				+ fieldValue.getClass().getCanonicalName());
  	}