public void setGatewayInstanceArn(String gatewayInstanceArn) {
        this.gatewayInstanceArn = gatewayInstanceArn;
    }
The Amazon Resource Name (ARN) of the gateway that contains the instance that you want to deregister.

@param gatewayInstanceArn
       The Amazon Resource Name (ARN) of the gateway that contains the instance that you want to deregister.
aws-java-sdk-mediaconnect/src/main/java/com/amazonaws/services/mediaconnect/model/DeregisterGatewayInstanceRequest.java