re>
<div class="block">Get the links attached to the message as header.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>links, may return empty <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util"><code>Set</code></a> if no links are present. Never returns <code>null</code>.</dd>
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