Index: wp-includes/class-wp-widget.php
===================================================================
--- wp-includes/class-wp-widget.php	(revision 37006)
+++ wp-includes/class-wp-widget.php	(working copy)
@@ -162,10 +162,15 @@
 	/**
 	 * PHP4 constructor.
 	 *
-	 * @param string $id_base
-	 * @param string $name
-	 * @param array  $widget_options
-	 * @param array  $control_options
+	 * @access public
+	 * 
+	 * @param string $id_base         Optional Base ID for the widget, lowercase and unique. If left empty,
+	 *                                a portion of the widget's class name will be used Has to be unique.
+	 * @param string $name            Name for the widget displayed on the configuration page.
+	 * @param array  $widget_options  Optional. Widget options. See wp_register_sidebar_widget() for information
+	 *                                on accepted arguments. Default empty array.
+	 * @param array  $control_options Optional. Widget control options. See wp_register_widget_control() for
+	 *                                information on accepted arguments. Default empty array.
 	 */
 	public function WP_Widget( $id_base, $name, $widget_options = array(), $control_options = array() ) {
 		_deprecated_constructor( 'WP_Widget', '4.3.0', get_class( $this ) );
@@ -179,6 +184,7 @@
 	 *
 	 * @since 2.8.0
 	 * @since 4.4.0 Array format field names are now accepted.
+	 * @access public
 	 *
 	 * @param string $field_name Field name
 	 * @return string Name attribute for $field_name
@@ -244,7 +250,7 @@
 	 * Set the internal order number for the widget instance.
 	 *
 	 * @since 2.8.0
-	 * @access private
+	 * @access public
 	 *
 	 * @param int $number The unique order number of this widget instance compared to other
 	 *                    instances of the same class.
@@ -258,6 +264,7 @@
 	 * Retrieves the widget display callback.
 	 *
 	 * @since 2.8.0
+	 * @access public
 	 *
 	 * @return callable Display callback.
 	 */
@@ -269,6 +276,7 @@
 	 * Retrieves the widget update callback.
 	 *
 	 * @since 2.8.0
+	 * @access public
 	 *
 	 * @return callable Update callback.
 	 */
@@ -280,6 +288,7 @@
 	 * Retrieves the form callback.
 	 *
 	 * @since 2.8.0
+	 * @access public
 	 *
 	 * @return callable Form callback.
 	 */
@@ -457,7 +466,12 @@
 	 * @since 2.8.0
 	 * @access public
 	 *
-	 * @param int|array $widget_args Widget instance number or array of widget arguments.
+	 * @param int|array $widget_args {
+	 *     Optional. Internal order number of the widget instance, or array of multi-widget arguments.
+	 *     Default 1.
+	 *
+	 *     @type int $number Number increment used for multiples of the same widget.
+	 * }
 	 * @return string|null
 	 */
 	public function form_callback( $widget_args = 1 ) {
@@ -517,7 +531,7 @@
 	 * Register an instance of the widget class.
 	 *
 	 * @since 2.8.0
-	 * @access private
+	 * @access public
 	 *
 	 * @param integer $number Optional. The unique order number of this widget instance
 	 *                        compared to other instances of the same class. Default -1.