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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def resolve_symbols(self, tree, database, link_resolver):
 """ When this method is called, the page's symbol names are queried from `database`, and added to lists of actual symbols, sorted by symbol class. """

        self.typed_symbols = self.__get_empty_typed_symbols()
        all_syms = OrderedSet()
        for sym_name in self.symbol_names:
            sym = database.get_symbol(sym_name)
            self.__query_extra_symbols(
                sym, all_syms, tree, link_resolver, database)

        if tree.project.is_toplevel:
            page_path = self.link.ref
        else:
            page_path = self.project_name + '/' + self.link.ref

        if self.meta.get("auto-sort", True):
            all_syms = sorted(all_syms, key=lambda x: x.unique_name)
        for sym in all_syms:
            sym.update_children_comments()
            self.__resolve_symbol(sym, link_resolver, page_path)
            self.symbol_names.add(sym.unique_name)

        # Always put symbols with no parent at the end
        no_parent_syms = self.by_parent_symbols.pop(None, None)
        if no_parent_syms:
            self.by_parent_symbols[None] = no_parent_syms

        for sym_type in [ClassSymbol, AliasSymbol, InterfaceSymbol,
                         StructSymbol]:
            syms = self.typed_symbols[sym_type].symbols

            if not syms:
                continue

            if self.title is None:
                self.title = syms[0].display_name
            if self.comment is None:
                self.comment = Comment(name=self.name)
                self.comment.short_description = syms[
                    0].comment.short_description
                self.comment.title = syms[0].comment.title
            break