r method, called when the event is fired.
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<h4>BEFORE_COMPLETION</h4>
<pre>public static final&nbsp;<a href="../../../jakarta/enterprise/event/TransactionPhase.html" title="enum in jakarta.enterprise.event">TransactionPhase</a> BEFORE_COMPLETION</pre>
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 Identifies a before completion observer method, called during the before completion phase of the transaction.
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