-- | The Lambda function to invoke when AWS Lambda detects an event on the stream.
gesmrFunctionArn :: Lens' GetEventSourceMappingResponse (Maybe Text)
gesmrFunctionArn = lens _gesmrFunctionArn (\s a -> s { _gesmrFunctionArn = a })
gesmrFunctionArn :: Lens' GetEventSourceMappingResponse (Maybe Text)
gesmrFunctionArn = lens _gesmrFunctionArn (\s a -> s { _gesmrFunctionArn = a })
gesmrFunctionArn = lens _gesmrFunctionArn (\s a -> s { _gesmrFunctionArn = a })