public void setGatewayArn(String gatewayArn) {
        this.gatewayArn = gatewayArn;
    }
The Amazon Resource Name (ARN) of the instance.

@param gatewayArn
       The Amazon Resource Name (ARN) of the instance.
aws-java-sdk-mediaconnect/src/main/java/com/amazonaws/services/mediaconnect/model/GatewayInstance.java