@SdkInternalApi
    final DescribeAvailabilityZonesResult executeDescribeAvailabilityZones(DescribeAvailabilityZonesRequest describeAvailabilityZonesRequest) {

        ExecutionContext executionContext = createExecutionContext(describeAvailabilityZonesRequest);
        AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
        awsRequestMetrics.startEvent(Field.ClientExecuteTime);
        Request<DescribeAvailabilityZonesRequest> request = null;
        Response<DescribeAvailabilityZonesResult> response = null;

        try {
            awsRequestMetrics.startEvent(Field.RequestMarshallTime);
            try {
                request = new DescribeAvailabilityZonesRequestMarshaller().marshall(super.beforeMarshalling(describeAvailabilityZonesRequest));
                // Binds the request metrics to the current request.
                request.setAWSRequestMetrics(awsRequestMetrics);
                request.addHandlerContext(HandlerContextKey.CLIENT_ENDPOINT, endpoint);
                request.addHandlerContext(HandlerContextKey.ENDPOINT_OVERRIDDEN, isEndpointOverridden());
                request.addHandlerContext(HandlerContextKey.SIGNING_REGION, getSigningRegion());
                request.addHandlerContext(HandlerContextKey.SERVICE_ID, "EC2");
                request.addHandlerContext(HandlerContextKey.OPERATION_NAME, "DescribeAvailabilityZones");
                request.addHandlerContext(HandlerContextKey.ADVANCED_CONFIG, advancedConfig);

            } finally {
                awsRequestMetrics.endEvent(Field.RequestMarshallTime);
            }

            StaxResponseHandler<DescribeAvailabilityZonesResult> responseHandler = new StaxResponseHandler<DescribeAvailabilityZonesResult>(
                    new DescribeAvailabilityZonesResultStaxUnmarshaller());

            response = invoke(request, responseHandler, executionContext);

            return response.getAwsResponse();

        } finally {

            endClientExecution(awsRequestMetrics, request, response);
        }
    }
<p>
Describes the Availability Zones, Local Zones, and Wavelength Zones that are available to you. If there is an
event impacting a zone, you can use this request to view the state and any provided messages for that zone.
</p>
<p>
For more information about Availability Zones, Local Zones, and Wavelength Zones, see <a
href="https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html">Regions and
zones</a> in the <i>Amazon EC2 User Guide</i>.
</p>
<note>
<p>
The order of the elements in the response, including those within nested structures, might vary. Applications
should not assume the elements appear in a particular order.
</p>
</note>

@param describeAvailabilityZonesRequest
@return Result of the DescribeAvailabilityZones operation returned by the service.
@sample AmazonEC2.DescribeAvailabilityZones
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/DescribeAvailabilityZones" target="_top">AWS
     API Documentation</a>
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/AmazonEC2Client.java