customize_save_{$id_base}
Action Hook: Fires when the WP_Customize_Setting::save() method is called.
Source: wp-includes/class-wp-customize-setting.php:539
WP_Customize_Setting::json()
Method: Retrieves the data to export to the client via JSON.
Source: wp-includes/class-wp-customize-setting.php:818
WP_Customize_Setting::post_value()
Method: Fetch and sanitize the $_POST value for the setting.
Source: wp-includes/class-wp-customize-setting.php:554
WP_Customize_Setting::check_capabilities()
Method: Validate user capabilities whether the theme supports the setting.
Source: wp-includes/class-wp-customize-setting.php:834