Props pavelevap, Presskopp. Fixes #33747. Built from https://develop.svn.wordpress.org/trunk@39927 git-svn-id: http://core.svn.wordpress.org/trunk@39864 1a063a9b-81f0-0310-95a4-ce76da25c4cd
custom_css
@access
WP_Customize_Partial::id_data
WP_Customize_Selective_Refresh
@since
WP_Widget_Form_Customize_Control::to_json()
::render_content()