public AddRegionRequest withRegionName(String regionName) {
        setRegionName(regionName);
        return this;
    }
<p>
The name of the Region where you want to add domain controllers for replication. For example,
<code>us-east-1</code>.
</p>

@param regionName
       The name of the Region where you want to add domain controllers for replication. 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-directory/src/main/java/com/amazonaws/services/directory/model/AddRegionRequest.java