Man pages matching name plucene::analysis::whitespaceanalyzer in section 3pm:

Plucene::Analysis::WhitespaceAnalyzer.3pm.en	debian 10 / libplucene-perl
Plucene::Analysis::WhitespaceAnalyzer.3pm.en	debian 11 / libplucene-perl
Plucene::Analysis::WhitespaceAnalyzer.3pm.en	debian 12 / libplucene-perl