widget_{$this->id_base}_instance_schema
Previously, `WP_Widget_Media_Audio`, `WP_Widget_Media_Image`, and `WP_Widget_Media_Video` used to override the changes due to reversed arguments in `array_merge()` call. Props Toro_Unit, birgire. Fixes #45029. Built from https://develop.svn.wordpress.org/trunk@45100 git-svn-id: http://core.svn.wordpress.org/trunk@44909 1a063a9b-81f0-0310-95a4-ce76da25c4cd
sanitize_text_field()
::form()