How to use the breathe.parser.doxygen.compound.parse function in breathe

def parse(self, refid):

        filename = self.path_handler.join(self.project_info.project_path(), "%s.xml" % refid)

        self.file_state_cache.update(filename)

        try: 
            # Try to get from our cache
            return self.cache[filename]
        except KeyError:

            # If that fails, parse it afresh
            try:
                result = breathe.parser.doxygen.compound.parse(filename)
                self.cache[filename] = result
                return result
            except breathe.parser.doxygen.compound.ParseError, e:
                raise ParserError(e, filename)
            except breathe.parser.doxygen.compound.FileIOError, e:
                raise FileIOError(e, filename)

def parse_doxygen(self):
        try:
            self.parsed_file =  doxygen_parse(self.fname)
            self.compound = self.parsed_file.get_compounddef()
            return self.parsed_file
        except Exception as e:
            print "Error parsing doxygen xml file", e.message
            self.parsing_error_message = e.message
            self.parsing_error = True
            return None