7 calls to drupal_maintenance_theme() in Drupal 9

authorize.php in core/authorize.php

Administrative script for running authorized file operations.

drupal_flush_all_caches in core/includes/common.inc

Rebuilds the container, flushes all persistent caches, resets all variables, and rebuilds all data structures.

install_begin_request in core/includes/install.core.inc

Begins an installation request, modifying the installation state as needed.

install_display_output in core/includes/install.core.inc

Displays themed installer output and ends the page request.

install_run_tasks in core/includes/install.core.inc

Runs all tasks for the current installation request.

MaintenanceModeSubscriber::onKernelRequestMaintenance in core/lib/Drupal/Core/EventSubscriber/MaintenanceModeSubscriber.php

Returns the site maintenance page if the site is offline.

MaintenanceThemeTest::testMaintenanceTheme in core/tests/Drupal/KernelTests/Core/Theme/MaintenanceThemeTest.php

Tests that the maintenance theme initializes the theme and its base themes.