def METHOD_NAME(self):
    config_relations = self._plugin_config.get("relations", None)
    if config_relations is None or config_relations == "":
        self.disable()
        raise PluginDisableException(
            """Disable plugin and exit, because the parameter 'relations' in section [relationssize] is not set. Set this parameter like relations=pg_catalog.pg_class,pg_catalog.pg_user to count size if needed and restart.""")
    self.relations = []
    for relation in config_relations.split(","):
        tmp_rel = relation.split(".")
        if len(tmp_rel) == 3:
            self.relations.append([tmp_rel[0].strip(), tmp_rel[1].strip(), tmp_rel[2].strip()])
        else:
            self.log.error(
                "The relation \"{relation}\" is not correct. You need to specify \"database_name.schema.table\" in the configuration file for mamonsu. Section: [relationssize], parameter: relations ".format(
                    relation=relation))