How add advance search in Clay management toolbar ?
<clay:management-toolbar
clearResultsURL="${assignmentsManagementToolbarDisplayContext.getSearchActionURL()}"
componentId="assignmentsManagementToolbar"
creationMenu="${assignmentsManagementToolbarDisplayContext.getCreationMenu()}"
disabled="${assignmentCount eq 0}"
filterDropdownItems="${assignmentsManagementToolbarDisplayContext.getFilterDropdownItems()}"
itemsTotal="${assignmentCount}"
searchActionURL="${assignmentsManagementToolbarDisplayContext.getSearchActionURL()}"
searchContainerId="assignmentEntries"
searchFormName="searchFm"
selectable="false"
showInfoButton="<%= true %>"
sortingOrder="${assignmentsManagementToolbarDisplayContext.getOrderByType()}"
sortingURL="${assignmentsManagementToolbarDisplayContext.getSortingURL()}"
viewTypeItems="${assignmentsManagementToolbarDisplayContext.getViewTypes()}"
showAdvancedSearch="<%= true %>"
searchDropdownItems="${assignmentsManagementToolbarDisplayContext.getFilterDropdownItems()}"
/>
How to add functionality of Advance Search ?