ultToolbar.prototype.drop = function(</td><td class="PParameter  prettyprint " nowrap>vertex,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>evt,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>target</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Handles a drop from a toolbar item to the graph.&nbsp; The given vertex represents the new cell to be inserted.&nbsp; This invokes <a href="#mxDefaultToolbar.insert" cl