public Region withRegionName(String regionName) {
        setRegionName(regionName);
        return this;
    }
<p>
The Region code of a given Region (for example, <code>us-east-1</code>).
</p>

@param regionName
       The Region code of a given Region (for example, <code>us-east-1</code>).
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-account/src/main/java/com/amazonaws/services/account/model/Region.java