Man pages matching name tree::xpathengine::function in section 3pm:

Tree::XPathEngine::Function.3pm.en	debian 10 / libtree-xpathengine-perl
Tree::XPathEngine::Function.3pm.en	debian 11 / libtree-xpathengine-perl
Tree::XPathEngine::Function.3pm.en	debian 12 / libtree-xpathengine-perl