WP_Widget_Form_Customize_Control
Widget Form Customize Control class.
WordPress File wp-includes/customize/class-wp-widget-form-customize-control.php
WP_Widget_Form_Customize_Control::active_callback()
Whether the current widget is rendered on the page.
WP_Widget_Form_Customize_Control::render_content()
Override render_content to be no-op since content is exported via to_json for deferred embedding.
WP_Widget_Form_Customize_Control::to_json()
Gather control params for exporting to JavaScript.