Correct return types of ol.layer.Base methods

src/ol/layer/layerbase.js

@@ -84,10 +84,11 @@ ol.layer.Base.prototype.dispatchChangeEvent = function() {
 
 
 /**
- * @return {number} Brightness.
+ * @return {number|undefined} Brightness.
  */
 ol.layer.Base.prototype.getBrightness = function() {
-  return /** @type {number} */ (this.get(ol.layer.LayerProperty.BRIGHTNESS));
+  return /** @type {number|undefined} */ (
+      this.get(ol.layer.LayerProperty.BRIGHTNESS));
 };
 goog.exportProperty(
     ol.layer.Base.prototype,
@@ -96,10 +97,11 @@ goog.exportProperty(
 
 
 /**
- * @return {number} Contrast.
+ * @return {number|undefined} Contrast.
  */
 ol.layer.Base.prototype.getContrast = function() {
-  return /** @type {number} */ (this.get(ol.layer.LayerProperty.CONTRAST));
+  return /** @type {number|undefined} */ (
+      this.get(ol.layer.LayerProperty.CONTRAST));
 };
 goog.exportProperty(
     ol.layer.Base.prototype,
@@ -108,10 +110,10 @@ goog.exportProperty(
 
 
 /**
- * @return {number} Hue.
+ * @return {number|undefined} Hue.
  */
 ol.layer.Base.prototype.getHue = function() {
-  return /** @type {number} */ (this.get(ol.layer.LayerProperty.HUE));
+  return /** @type {number|undefined} */ (this.get(ol.layer.LayerProperty.HUE));
 };
 goog.exportProperty(
     ol.layer.Base.prototype,
@@ -168,10 +170,10 @@ ol.layer.Base.prototype.getLayerStatesArray = goog.abstractMethod;
 
 
 /**
- * @return {number} MaxResolution.
+ * @return {number|undefined} MaxResolution.
  */
 ol.layer.Base.prototype.getMaxResolution = function() {
-  return /** @type {number} */ (
+  return /** @type {number|undefined} */ (
       this.get(ol.layer.LayerProperty.MAX_RESOLUTION));
 };
 goog.exportProperty(
@@ -181,10 +183,10 @@ goog.exportProperty(
 
 
 /**
- * @return {number} MinResolution.
+ * @return {number|undefined} MinResolution.
  */
 ol.layer.Base.prototype.getMinResolution = function() {
-  return /** @type {number} */ (
+  return /** @type {number|undefined} */ (
       this.get(ol.layer.LayerProperty.MIN_RESOLUTION));
 };
 goog.exportProperty(
@@ -194,10 +196,11 @@ goog.exportProperty(
 
 
 /**
- * @return {number} Opacity.
+ * @return {number|undefined} Opacity.
  */
 ol.layer.Base.prototype.getOpacity = function() {
-  return /** @type {number} */ (this.get(ol.layer.LayerProperty.OPACITY));
+  return /** @type {number|undefined} */ (
+      this.get(ol.layer.LayerProperty.OPACITY));
 };
 goog.exportProperty(
     ol.layer.Base.prototype,
@@ -206,10 +209,11 @@ goog.exportProperty(
 
 
 /**
- * @return {number} Saturation.
+ * @return {number|undefined} Saturation.
  */
 ol.layer.Base.prototype.getSaturation = function() {
-  return /** @type {number} */ (this.get(ol.layer.LayerProperty.SATURATION));
+  return /** @type {number|undefined} */ (
+      this.get(ol.layer.LayerProperty.SATURATION));
 };
 goog.exportProperty(
     ol.layer.Base.prototype,
@@ -224,10 +228,11 @@ ol.layer.Base.prototype.getSourceState = goog.abstractMethod;
 
 
 /**
- * @return {boolean} Visible.
+ * @return {boolean|undefined} Visible.
  */
 ol.layer.Base.prototype.getVisible = function() {
-  return /** @type {boolean} */ (this.get(ol.layer.LayerProperty.VISIBLE));
+  return /** @type {boolean|undefined} */ (
+      this.get(ol.layer.LayerProperty.VISIBLE));
 };
 goog.exportProperty(
     ol.layer.Base.prototype,
@@ -253,7 +258,7 @@ goog.exportProperty(
  * [2] https://github.com/WebKit/webkit/commit/8f4765e569
  * [3] https://www.w3.org/Bugs/Public/show_bug.cgi?id=15647
  *
- * @param {number} brightness Brightness.
+ * @param {number|undefined} brightness Brightness.
  */
 ol.layer.Base.prototype.setBrightness = function(brightness) {
   this.set(ol.layer.LayerProperty.BRIGHTNESS, brightness);
@@ -269,7 +274,7 @@ goog.exportProperty(
  * grey.  A value of 1 will leave the contrast unchanged.  Other values are
  * linear multipliers on the effect (and values over 1 are permitted).
  *
- * @param {number} contrast Contrast.
+ * @param {number|undefined} contrast Contrast.
  */
 ol.layer.Base.prototype.setContrast = function(contrast) {
   this.set(ol.layer.LayerProperty.CONTRAST, contrast);
@@ -283,7 +288,7 @@ goog.exportProperty(
 /**
  * Apply a hue-rotation to the layer.  A value of 0 will leave the hue
  * unchanged.  Other values are radians around the color circle.
- * @param {number} hue Hue.
+ * @param {number|undefined} hue Hue.
  */
 ol.layer.Base.prototype.setHue = function(hue) {
   this.set(ol.layer.LayerProperty.HUE, hue);
@@ -295,7 +300,7 @@ goog.exportProperty(
 
 
 /**
- * @param {number} maxResolution MaxResolution.
+ * @param {number|undefined} maxResolution MaxResolution.
  */
 ol.layer.Base.prototype.setMaxResolution = function(maxResolution) {
   this.set(ol.layer.LayerProperty.MAX_RESOLUTION, maxResolution);
@@ -307,7 +312,7 @@ goog.exportProperty(
 
 
 /**
- * @param {number} minResolution MinResolution.
+ * @param {number|undefined} minResolution MinResolution.
  */
 ol.layer.Base.prototype.setMinResolution = function(minResolution) {
   this.set(ol.layer.LayerProperty.MIN_RESOLUTION, minResolution);
@@ -319,7 +324,7 @@ goog.exportProperty(
 
 
 /**
- * @param {number} opacity Opacity.
+ * @param {number|undefined} opacity Opacity.
  */
 ol.layer.Base.prototype.setOpacity = function(opacity) {
   this.set(ol.layer.LayerProperty.OPACITY, opacity);
@@ -336,7 +341,7 @@ goog.exportProperty(
  * values are linear multipliers of the effect (and values over 1 are
  * permitted).
  *
- * @param {number} saturation Saturation.
+ * @param {number|undefined} saturation Saturation.
  */
 ol.layer.Base.prototype.setSaturation = function(saturation) {
   this.set(ol.layer.LayerProperty.SATURATION, saturation);
@@ -348,7 +353,7 @@ goog.exportProperty(
 
 
 /**
- * @param {boolean} visible Visible.
+ * @param {boolean|undefined} visible Visible.
  */
 ol.layer.Base.prototype.setVisible = function(visible) {
   this.set(ol.layer.LayerProperty.VISIBLE, visible);