public void setVersionNumber(Long versionNumber) {
        this.versionNumber = versionNumber;
    }
<p>
The version number of the dashboard. If the version number property is provided, only the specified version of
the dashboard is deleted.
</p>

@param versionNumber
       The version number of the dashboard. If the version number property is provided, only the specified
       version of the dashboard is deleted.
aws-java-sdk-quicksight/src/main/java/com/amazonaws/services/quicksight/model/DeleteDashboardRequest.java