@Override
    public java.util.concurrent.Future<CreateConnectorDefinitionResult> createConnectorDefinitionAsync(CreateConnectorDefinitionRequest request) {

        return createConnectorDefinitionAsync(request, null);
    }
Returns the executor service used by this client to execute async requests.

@return The executor service used by this client to execute async requests.
aws-java-sdk-greengrass/src/main/java/com/amazonaws/services/greengrass/AWSGreengrassAsyncClient.java