WP_Customize_Widgets::sanitize_widget_js_instance() WordPress Method

	public function sanitize_widget_js_instance( $value, $id_base = null ) {
		global $wp_widget_factory;

		if ( empty( $value['is_widget_customizer_js_value'] ) ) {
			$serialized = serialize( $value );

			$js_value = array(
				'encoded_serialized_instance'   => base64_encode( $serialized ),
				'title'                         => empty( $value['title'] ) ? '' : $value['title'],
				'is_widget_customizer_js_value' => true,
				'instance_hash_key'             => $this->get_instance_hash_key( $serialized ),
			);

			if ( $id_base && wp_use_widgets_block_editor() ) {
				$widget_object = $wp_widget_factory->get_widget_object( $id_base );
				if ( ! empty( $widget_object->widget_options['show_instance_in_rest'] ) ) {
					$js_value['raw_instance'] = (object) $value;
				}
			}

			return $js_value;
		}

		return $value;
	}