@Override
    public java.util.concurrent.Future<GetReportMetadataResult> getReportMetadataAsync(GetReportMetadataRequest request) {

        return getReportMetadataAsync(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-artifact/src/main/java/com/amazonaws/services/artifact/AWSArtifactAsyncClient.java