tCallback.Function</a>&nbsp;fi,
 <a href="https://docs.oracle.com/en/java/javase/22/docs/api/java.base/java/lang/foreign/Arena.html" title="class or interface in java.lang.foreign" class="external-link">Arena</a>&nbsp;arena)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">
<div class="block">Allocates a new upcall stub, whose implementation is defined by <code>fi</code>.</div>
</div>
<div class="col-first odd-row-color method-summary