How to use the zappa.handler.LambdaHandler.__instance function in zappa

def __new__(cls, settings_name="zappa_settings", session=None):
        """Singleton instance to avoid repeat setup"""
        if LambdaHandler.__instance is None:
            LambdaHandler.__instance = object.__new__(cls, settings_name, session)
        return LambdaHandler.__instance

def __new__(cls, settings_name="zappa_settings", session=None):
        """Singleton instance to avoid repeat setup"""
        if LambdaHandler.__instance is None:
            LambdaHandler.__instance = object.__new__(cls, settings_name, session)
        return LambdaHandler.__instance

def __new__(cls, settings_name="zappa_settings", session=None):
        """Singleton instance to avoid repeat setup"""
        if LambdaHandler.__instance is None:
            LambdaHandler.__instance = object.__new__(cls, settings_name, session)
        return LambdaHandler.__instance