public void setArn(String arn) {
        this.arn = arn;
    }
<p>
The ARN of the IAM role. For more information, see <a
href="https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_identifiers.html">IAM ARNs</a> in the <i>IAM
User Guide</i>.
</p>

@param arn
       The ARN of the IAM role. For more information, see <a
       href="https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_identifiers.html">IAM ARNs</a> in the
       <i>IAM User Guide</i>.
aws-java-sdk-iotsitewise/src/main/java/com/amazonaws/services/iotsitewise/model/IAMRoleIdentity.java