public MetricDestinationSummary withIamRoleArn(String iamRoleArn) {
        setIamRoleArn(iamRoleArn);
        return this;
    }
<p>
This field appears only when the destination is <code>Evidently</code>. It specifies the ARN of the IAM role that
is used to write to the Evidently experiment that receives the metrics.
</p>

@param iamRoleArn
       This field appears only when the destination is <code>Evidently</code>. It specifies the ARN of the IAM
       role that is used to write to the Evidently experiment that receives the metrics.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-cloudwatchrum/src/main/java/com/amazonaws/services/cloudwatchrum/model/MetricDestinationSummary.java