/** {@inheritDoc} */
public CharSequence reorderCombiningMarks ( CharSequence cs, int[][] gpa, String script, String language ) {
if ( metric instanceof Substitutable ) {
Substitutable s = (Substitutable) metric;
return s.reorderCombiningMarks ( cs, gpa, script, language );
} else {
throw new UnsupportedOperationException();
}
}