public DescribeUpdateDirectoryRequest withRegionName(String regionName) {
        setRegionName(regionName);
        return this;
    }
<p>
The name of the Region.
</p>

@param regionName
       The name of the Region.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-directory/src/main/java/com/amazonaws/services/directory/model/DescribeUpdateDirectoryRequest.java