- cython compatibility restored

    cpdef is_anonymous(self)

    cpdef _content(self)

    cpdef with_pos(self, pos)

    cpdef has_attr(self)

    # cpdef has_attr(self, attr)

    # cpdef compare_attr(self, other)

    # cpdef _tree_repr(self, tab, open_fn, close_fn, data_fn, density, inline, inline_fn)

    # cpdef as_sxpr(self, src, indentation, compact)

    # cpdef as_xml(self, src, indentation, inline_tags, omit_tags, empty_tags)

    # cpdef select_if(self, match_function, include_root, reverse)

    # cpdef select(self, tag_names, include_root)

    cpdef pick(self, tag_names)

    # cpdef pick(self, criterion, reverse)

    # cpdef tree_size(self)

    cpdef to_json_obj(self)

        """

        return self.select_if(create_match_function(criterion), include_root, reverse)

    def pick(self, criterion: CriteriaType,

             reverse: bool = False) -> Optional['Node']:

    def pick(self, criterion: CriteriaType, reverse: bool = False) -> Optional['Node']:

        """

        Picks the first (or last if run in reverse mode) descendant that fulfills

        the given criterion which can be either a match-function or a tag-name or