public Activation withDefaultInstanceName(String defaultInstanceName) {
        setDefaultInstanceName(defaultInstanceName);
        return this;
    }
<p>
A name for the managed node when it is created.
</p>

@param defaultInstanceName
       A name for the managed node when it is created.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-ssm/src/main/java/com/amazonaws/services/simplesystemsmanagement/model/Activation.java