public String getValueDescription() {
        try {
            return getValueDescription(getValue());
        } catch (final ImagingException e) {
            return "Invalid value: " + e.getMessage();
        }
    }
Returns the field's tag, derived from bytes 0-1.

@return the tag, as an {@code int} in which only the lowest 2 bytes are set
src/main/java/org/apache/commons/imaging/formats/tiff/TiffField.java