external tree_select_descendant : tree -> [`Tree ] Node.t -> unordered_set -> [`Tree] Node.t = "caml_xml_tree_select_descendant" "noalloc"
let select_descendant t n tag_set = tree_select_descendant t.doc n tag_set
external tree_select_descendant : tree -> [`Tree ] Node.t -> unordered_set -> [`Tree] Node.t = "caml_xml_tree_select_descendant" "noalloc"
let select_descendant t n tag_set = tree_select_descendant t.doc n tag_set