neral no shared state should be used and any caching of computed
 values must be done with proper synchronization.</p>
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<DT><B>Parameters:</B><DD><CODE>keyNullifier</CODE> - the user-supplied object used for setting
 single-valued foreign keys to null.<DT><B>See Also:</B><DD><A HREF="../../../com/sleepycat/db/ForeignKeyNullifier.html" title="interface in com.sleepycat.db"><CODE>@see ForeignKeyDeleteAction#NULLIFY @see
 #setForeignKeyDatabase</CODE></A></DL>
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