From a5deac3684e42b84596ba95524af8066d8c4cc58 Mon Sep 17 00:00:00 2001
From: Chris Malley <cmalley@pixelzoom.com>
Date: Fri, 24 Aug 2018 18:31:13 -0600
Subject: [PATCH] use object and attribute options for animation targets,
 https://github.com/phetsims/twixt/issues/18

Signed-off-by: Chris Malley <cmalley@pixelzoom.com>
---
 js/common/view/DoubleNumberLineAccordionBox.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/js/common/view/DoubleNumberLineAccordionBox.js b/js/common/view/DoubleNumberLineAccordionBox.js
index d88dd96b..1adf6424 100644
--- a/js/common/view/DoubleNumberLineAccordionBox.js
+++ b/js/common/view/DoubleNumberLineAccordionBox.js
@@ -261,8 +261,8 @@ define( function( require ) {
             stepper: 'timer', // animation is controlled by the global phet-core Timer
             duration: 0.002 * Math.abs( destinationX - markerEditorNode.x ), // 2ms per 1 unit of distance
             easing: Easing.QUADRATIC_IN_OUT,
-            setValue: function( value ) { markerEditorNode.x = value; },
-            getValue: function() { return markerEditorNode.x; },
+            object: markerEditorNode,
+            attribute: 'x',
             to: destinationX
           } );