Converting away from Poolable2 => Pool, see phetsims/phet-core#103

js/display/RelativeTransform.js

@@ -637,7 +637,7 @@ class RelativeTransform {
     // get the relative matrix, computed to be up-to-date, and ignores any flags/counts so we can check whether our
     // state is consistent
     function currentRelativeMatrix( instance ) {
-      const resultMatrix = Matrix3.dirtyFromPool();
+      const resultMatrix = Matrix3.pool.fetch();
       const nodeMatrix = instance.node.getMatrix();
 
       if ( !instance.parent ) {

js/display/drawables/CircleDOMDrawable.js

@@ -36,7 +36,7 @@ class CircleDOMDrawable extends CircleStatefulDrawable( DOMSelfDrawable ) {
     super.initialize( renderer, instance );
 
     // @protected {Matrix3} - We need to store an independent matrix, as our CSS transform actually depends on the radius.
-    this.matrix = this.matrix || Matrix3.dirtyFromPool();
+    this.matrix = this.matrix || Matrix3.pool.fetch();
 
     // only create elements if we don't already have them (we pool visual states always, and depending on the platform may also pool the actual elements to minimize
     // allocation and performance costs)

js/display/drawables/RectangleDOMDrawable.js

@@ -14,7 +14,7 @@ import { scenery, Features, Utils, DOMSelfDrawable, RectangleStatefulDrawable }
 const keepDOMRectangleElements = true; // whether we should pool DOM elements for the DOM rendering states, or whether we should free them when possible for memory
 
 // scratch matrix used in DOM rendering
-const scratchMatrix = Matrix3.dirtyFromPool();
+const scratchMatrix = Matrix3.pool.fetch();
 
 class RectangleDOMDrawable extends RectangleStatefulDrawable( DOMSelfDrawable ) {
   /**

js/display/drawables/TextDOMDrawable.js

@@ -14,7 +14,7 @@ import { scenery, Utils, DOMSelfDrawable, TextStatefulDrawable } from '../../imp
 const keepDOMTextElements = true; // whether we should pool DOM elements for the DOM rendering states, or whether we should free them when possible for memory
 
 // scratch matrix used in DOM rendering
-const scratchMatrix = Matrix3.dirtyFromPool();
+const scratchMatrix = Matrix3.pool.fetch();
 
 class TextDOMDrawable extends TextStatefulDrawable( DOMSelfDrawable ) {
   /**

js/input/BatchedDOMEvent.ts

@@ -9,8 +9,8 @@
 
 import Enumeration from '../../../phet-core/js/Enumeration.js';
 import EnumerationValue from '../../../phet-core/js/EnumerationValue.js';
-import Poolable2 from '../../../phet-core/js/Poolable2.js';
-import { scenery, Input } from '../imports.js';
+import Pool, { IPoolable } from '../../../phet-core/js/Pool.js';
+import { Input, scenery } from '../imports.js';
 
 type BatchedDOMEventCallback = ( ...args: any[] ) => void;
 
@@ -26,15 +26,13 @@ class BatchedDOMEventType extends EnumerationValue {
   } );
 }
 
-class BatchedDOMEvent extends Poolable2<[Event, BatchedDOMEventType, ( ...args: any[] ) => void], BatchedDOMEvent>( Object ) { // eslint-disable-line
+class BatchedDOMEvent implements IPoolable {
 
   domEvent!: Event | null;
   type!: BatchedDOMEventType | null;
   callback!: BatchedDOMEventCallback | null;
 
   constructor( domEvent: Event, type: BatchedDOMEventType, callback: BatchedDOMEventCallback ) {
-    super();
-
     this.initialize( domEvent, type, callback );
   }
 
@@ -103,9 +101,13 @@ class BatchedDOMEvent extends Poolable2<[Event, BatchedDOMEventType, ( ...args:
     this.callback = null;
     this.freeToPool();
   }
-}
 
-BatchedDOMEvent.initializePool();
+  freeToPool() {
+    BatchedDOMEvent.pool.freeToPool( this );
+  }
+
+  static pool = new Pool( BatchedDOMEvent );
+}
 
 scenery.register( 'BatchedDOMEvent', BatchedDOMEvent );
 

js/input/Input.ts

@@ -826,7 +826,7 @@ class Input {
 
     // If our display is not interactive, do not respond to any events (but still prevent default)
     if ( this.display.interactive ) {
-      this.batchedEvents.push( BatchedDOMEvent.createFromPool( domEvent, batchType, callback ) );
+      this.batchedEvents.push( BatchedDOMEvent.pool.create( domEvent, batchType, callback ) );
       if ( triggerImmediate || !this.batchDOMEvents ) {
         this.fireBatchedEvents();
       }
@@ -951,7 +951,7 @@ class Input {
    * Extract a {Vector2} global coordinate point from an arbitrary DOM event. (scenery-internal)
    */
   pointFromEvent( domEvent: MouseEvent | WindowTouch ): Vector2 {
-    const position = Vector2.createFromPool( domEvent.clientX, domEvent.clientY );
+    const position = Vector2.pool.create( domEvent.clientX, domEvent.clientY );
     if ( !this.assumeFullWindow ) {
       const domBounds = this.display.domElement.getBoundingClientRect();
 

js/util/LinearGradient.ts

@@ -47,7 +47,7 @@ class LinearGradient extends Gradient {
    * Creates an SVG paint object for creating/updating the SVG equivalent definition.
    */
   createSVGPaint( svgBlock: SVGBlock ): SVGLinearGradient {
-    return SVGLinearGradient.pool.createFromPool( svgBlock, this );
+    return SVGLinearGradient.pool.create( svgBlock, this );
   }
 
   /**

js/util/Pattern.ts

@@ -41,7 +41,7 @@ class Pattern extends Paint {
    * Creates an SVG paint object for creating/updating the SVG equivalent definition.
    */
   createSVGPaint( svgBlock: SVGBlock ): SVGPattern {
-    return SVGPattern.pool.createFromPool( this );
+    return SVGPattern.pool.create( this );
   }
 
   /**

js/util/RadialGradient.ts

@@ -91,7 +91,7 @@ class RadialGradient extends Gradient {
    * Creates an SVG paint object for creating/updating the SVG equivalent definition.
    */
   createSVGPaint( svgBlock: SVGBlock ): SVGRadialGradient {
-    return SVGRadialGradient.pool.createFromPool( svgBlock, this );
+    return SVGRadialGradient.pool.create( svgBlock, this );
   }
 
   /**