def _call_migrate(self, module, connection_param):
args = [connection_param]<EOL>spec = inspect.getargspec(module.migrate)<EOL>if len(spec.args) == <NUM_LIT:2>:<EOL><INDENT>args.append(self.db_config)<EOL><DEDENT>return module.migrate(*args)<EOL>
Subclasses should call this method instead of `module.migrate` directly,
        to support `db_config` optional argument.