wp_ajax_so_installer_dismiss

See hook in action

See this hook used in plugins:

Select Pluginsiteorigin-panels.2.24.0siteorigin-panels.2.25.0siteorigin-panels.2.25.2siteorigin-panels.2.25.3siteorigin-panels.2.26.0siteorigin-panels.2.26.1siteorigin-panels.2.26.2siteorigin-panels.2.27.0siteorigin-panels.2.28.0siteorigin-panels.2.29.3siteorigin-panels.2.29.4siteorigin-panels.2.29.5siteorigin-panels.2.29.6siteorigin-panels.2.29.8siteorigin-panels.2.29.9siteorigin-panels.2.29.15