ect handles.</div>
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<div class="col-first odd-row-color"><a href="class-use/LockType.html#jakarta.ejb">LockType</a></div>
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<div class="block">Concurrency lock type for singleton beans with container-managed concurrency.</div>
</div>
<div class="col-first even-row-color"><a href="class-use/MessageDrivenContext.html#jakarta.ejb">MessageDrivenContext</a></div>
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<div class="block">The MessageDrivenContext interface provides access to