w3tc_ajax_cdn_bunnycdn_widgetdata

See hook in action

See this hook used in plugins:

Select Pluginw3-total-cache.2.6.0w3-total-cache.2.6.1w3-total-cache.2.7.0w3-total-cache.2.7.2w3-total-cache.2.7.5w3-total-cache.2.7.7w3-total-cache.2.8.0