public Object getFieldValue(final TagInfo tag) throws ImagingException {
        final TiffField field = findField(tag);
        if (field == null) {
            return null;
        }
        return field.getValue();
    }
Gets the byte order used by the source file for storing this directory and its content.

@return A valid byte order instance.
src/main/java/org/apache/commons/imaging/formats/tiff/TiffDirectory.java