public void setVersions(String versions) {
        this.versions = versions;
    }
<p>
A version range may be supplied which may be of the format:
</p>
<ul>
<li>
<p>
a single version number, 5
</p>
</li>
<li>
<p>
a range, 5-8 : deletes versions 5, 6, 7, 8
</p>
</li>
</ul>

@param versions
       A version range may be supplied which may be of the format:</p>
       <ul>
       <li>
       <p>
       a single version number, 5
       </p>
       </li>
       <li>
       <p>
       a range, 5-8 : deletes versions 5, 6, 7, 8
       </p>
       </li>
aws-java-sdk-glue/src/main/java/com/amazonaws/services/glue/model/DeleteSchemaVersionsRequest.java