rTransaction</code>
 interface. As entity beans must always use container-managed transactions, only session beans or message-driven beans
 with bean-managed transactions are allowed to invoke this method.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The <code>UserTransaction</code> interface that the enterprise bean instance can use for transaction
 demarcation.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/