@Override
    public CreateDefaultSubnetResult createDefaultSubnet(CreateDefaultSubnetRequest request) {
        request = beforeClientExecution(request);
        return executeCreateDefaultSubnet(request);
    }
<p>
Creates a default subnet with a size <code>/20</code> IPv4 CIDR block in the specified Availability Zone in your
default VPC. You can have only one default subnet per Availability Zone. For more information, see <a
href="https://docs.aws.amazon.com/vpc/latest/userguide/default-vpc.html#create-default-subnet">Create a default
subnet</a> in the <i>Amazon VPC User Guide</i>.
</p>

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