Replace getChangeEventType() with add/removeChangeListener methods

src/ol/layer/Group.js

@@ -9,7 +9,6 @@ import ObjectEventType from '../ObjectEventType.js';
 import SourceState from '../source/State.js';
 import {assert} from '../asserts.js';
 import {assign, clear} from '../obj.js';
-import {getChangeEventType} from '../Object.js';
 import {getIntersection} from '../extent.js';
 import {getUid} from '../util.js';
 import {listen, unlistenByKey} from '../events.js';
@@ -77,10 +76,7 @@ class LayerGroup extends BaseLayer {
      */
     this.listenerKeys_ = {};
 
-    this.addEventListener(
-      getChangeEventType(Property.LAYERS),
-      this.handleLayersChanged_
-    );
+    this.addChangeListener(Property.LAYERS, this.handleLayersChanged_);
 
     if (layers) {
       if (Array.isArray(layers)) {

src/ol/layer/Heatmap.js

@@ -6,7 +6,6 @@ import WebGLPointsLayerRenderer from '../renderer/webgl/PointsLayer.js';
 import {assign} from '../obj.js';
 import {clamp} from '../math.js';
 import {createCanvasContext2D} from '../dom.js';
-import {getChangeEventType} from '../Object.js';
 
 /**
  * @typedef {Object} Options
@@ -86,10 +85,7 @@ class Heatmap extends VectorLayer {
      */
     this.gradient_ = null;
 
-    this.addEventListener(
-      getChangeEventType(Property.GRADIENT),
-      this.handleGradientChanged_
-    );
+    this.addChangeListener(Property.GRADIENT, this.handleGradientChanged_);
 
     this.setGradient(options.gradient ? options.gradient : DEFAULT_GRADIENT);
 

src/ol/layer/Layer.js

@@ -8,7 +8,6 @@ import RenderEventType from '../render/EventType.js';
 import SourceState from '../source/State.js';
 import {assert} from '../asserts.js';
 import {assign} from '../obj.js';
-import {getChangeEventType} from '../Object.js';
 import {listen, unlistenByKey} from '../events.js';
 
 /**
@@ -130,8 +129,8 @@ class Layer extends BaseLayer {
       this.setMap(options.map);
     }
 
-    this.addEventListener(
-      getChangeEventType(LayerProperty.SOURCE),
+    this.addChangeListener(
+      LayerProperty.SOURCE,
       this.handleSourcePropertyChange_
     );