* `WP_Customize_Background_Image_Control::$type` * `WP_Customize_Background_Image_Setting::$id` * `WP_Customize_Header_Image_Setting::$id` Follow-up to [21037], [21053], [30885]. Props iamjaydip. See #55646. Built from https://develop.svn.wordpress.org/trunk@53411 git-svn-id: http://core.svn.wordpress.org/trunk@53000 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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