ist">
<h4>preflight</h4>
<pre>public&nbsp;io.vertx.core.Future&lt;java.lang.Void&gt;&nbsp;preflight(@Nonnull
                                                      java.lang.String&nbsp;userName,
                                                      @Nonnull
                                                      io.vertx.core.json.JsonObject&nbsp;payload)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../com/hcl/domino/keep/dbreque