Gets delimited text from an Text object which follows a given text offset.
a pointer to the Text object on which to operate.
a int indicating the offset from which the delimiter search is based.
an TextBoundaryType indicating whether the desired text string is a word, sentence, line, or attribute run.
an TextRange containing a UTF-8 string representing the delimited text, both of whose delimiting boundaries are after or inclusive of the current offset, or an empty string if no such text exists.