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<h4>foreignKey</h4>
<pre>public abstract&nbsp;<a href="../../jakarta/persistence/ForeignKey.html" title="annotation in jakarta.persistence">ForeignKey</a>&nbsp;foreignKey</pre>
<div class="block">(Optional) Used to specify or control the generation of a
  foreign key constraint when table generation is in effect.
  If both this element and the <code>foreignKey</code>
  element of any of the <code>MapKeyJoinColumn</code>
  elements are specified, the behavior is undefined.  If no
  for