public void setARN(String aRN) {
        this.aRN = aRN;
    }
<p>
The ARN (Amazon Resource Name) of the subnet group.
</p>

@param aRN
       The ARN (Amazon Resource Name) of the subnet group.
aws-java-sdk-memorydb/src/main/java/com/amazonaws/services/memorydb/model/SubnetGroup.java