/usr/include/CLucene/highlighter/ is in libclucene-dev 2.3.3.4-4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/CLucene/highlighter/Encoder.h
/usr/include/CLucene/highlighter/Formatter.h
/usr/include/CLucene/highlighter/Fragmenter.h
/usr/include/CLucene/highlighter/HighlightScorer.h
/usr/include/CLucene/highlighter/Highlighter.h
/usr/include/CLucene/highlighter/QueryScorer.h
/usr/include/CLucene/highlighter/QueryTermExtractor.h
/usr/include/CLucene/highlighter/Scorer.h
/usr/include/CLucene/highlighter/SimpleFragmenter.h
/usr/include/CLucene/highlighter/SimpleHTMLEncoder.h
/usr/include/CLucene/highlighter/SimpleHTMLFormatter.h
/usr/include/CLucene/highlighter/TextFragment.h
/usr/include/CLucene/highlighter/TokenGroup.h
/usr/include/CLucene/highlighter/TokenSources.h
/usr/include/CLucene/highlighter/WeightedTerm.h