<action title="Slide show" action_id="noajax" category="object"
condition_expr="python:object.listNearestFolderContents(contentFilter={'portal_type' : 'Photo'})"
icon_expr="" link_target="" url_expr="string:${object_url}/slide_show"
<action title="Slide show" action_id="noajax" category="object"
condition_expr="python:object.listNearestFolderContents(contentFilter={'portal_type' : 'Photo'})"
icon_expr="" link_target="" url_expr="string:${object_url}/slide_show"