public Boolean getUnsetDefaultVersion() {
        return this.unsetDefaultVersion;
    }
<p>
Indicates whether you want to remove the named default package version from the software package. Set as
<code>true</code> to remove the default package version.
</p>
<p>
<b>Note:</b> You cannot name a <code>defaultVersion</code> and set <code>unsetDefaultVersion</code> equal to
<code>true</code> at the same time.
</p>

@return Indicates whether you want to remove the named default package version from the software package. Set as
        <code>true</code> to remove the default package version. </p>
        <p>
        <b>Note:</b> You cannot name a <code>defaultVersion</code> and set <code>unsetDefaultVersion</code> equal
        to <code>true</code> at the same time.
aws-java-sdk-iot/src/main/java/com/amazonaws/services/iot/model/UpdatePackageRequest.java