public void setGatewayId(String gatewayId) {
        this.gatewayId = gatewayId;
    }
<p>
The unique identifier assigned to your gateway during activation. This ID becomes part of the gateway Amazon
Resource Name (ARN), which you use as input for other operations.
</p>

@param gatewayId
       The unique identifier assigned to your gateway during activation. This ID becomes part of the gateway
       Amazon Resource Name (ARN), which you use as input for other operations.
aws-java-sdk-storagegateway/src/main/java/com/amazonaws/services/storagegateway/model/DescribeGatewayInformationResult.java