public void setVersionNumber(Long versionNumber) {
        this.versionNumber = versionNumber;
    }
<p>
The new version number of the registration.
</p>

@param versionNumber
       The new version number of the registration.
aws-java-sdk-pinpointsmsvoicev2/src/main/java/com/amazonaws/services/pinpointsmsvoicev2/model/CreateRegistrationVersionResult.java