if (doc.isIdentifierChar(languageIndex, ch)) {
do {
ch = seg.next();
} while (doc.isIdentifierChar(languageIndex, ch));
}
// The "word" is whitespace.
if (doc.isIdentifierChar(languageIndex, ch)) {
do {
ch = seg.next();
} while (doc.isIdentifierChar(languageIndex, ch) &&
ch != CharacterIterator.DONE);
}