var -> const in require statements, use arrow function in define requ…

…ire call, phetsims/tasks#1010

js/resistance-in-a-wire-main.js

@@ -5,21 +5,21 @@
  * @author Vasily Shakhov (Mlearner)
  * @author Anton Ulyanov (Mlearner)
  */
-define( function( require ) {
+define( require => {
   'use strict';
 
   // modules
-  var ResistanceInAWireScreen = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireScreen' );
-  var Sim = require( 'JOIST/Sim' );
-  var SimLauncher = require( 'JOIST/SimLauncher' );
-  var SliderAndGeneralKeyboardHelpContent = require( 'SCENERY_PHET/keyboard/help/SliderAndGeneralKeyboardHelpContent' );
-  var Tandem = require( 'TANDEM/Tandem' );
+  const ResistanceInAWireScreen = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireScreen' );
+  const Sim = require( 'JOIST/Sim' );
+  const SimLauncher = require( 'JOIST/SimLauncher' );
+  const SliderAndGeneralKeyboardHelpContent = require( 'SCENERY_PHET/keyboard/help/SliderAndGeneralKeyboardHelpContent' );
+  const Tandem = require( 'TANDEM/Tandem' );
 
   // constants
   var tandem = Tandem.rootTandem;
 
   // strings
-  var resistanceInAWireTitleString = require( 'string!RESISTANCE_IN_A_WIRE/resistance-in-a-wire.title' );
+  const resistanceInAWireTitleString = require( 'string!RESISTANCE_IN_A_WIRE/resistance-in-a-wire.title' );
 
   // help content to describe keyboard interactions
   var keyboardHelpContent = new SliderAndGeneralKeyboardHelpContent();

js/resistance-in-a-wire/ResistanceInAWireA11yStrings.js

@@ -7,11 +7,11 @@
  *
  * @author Jesse Greenberg
  */
-define( function( require ) {
+define( require => {
   'use strict';
 
   // modules
-  var resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
+  const resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
 
   var ResistanceInAWireA11yStrings = {
     summarySimString: { 

js/resistance-in-a-wire/ResistanceInAWireConstants.js

@@ -5,16 +5,16 @@
  *
  * @author Martin Veillette (Berea College)
  */
-define( function( require ) {
+define( require => {
   'use strict';
 
   // modules
-  var PhetFont = require( 'SCENERY_PHET/PhetFont' );
-  var Range = require( 'DOT/Range' );
-  var RangeWithValue = require( 'DOT/RangeWithValue' );
-  var resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
-  var ResistanceInAWireA11yStrings = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireA11yStrings' );
-  var Util = require( 'DOT/Util' );
+  const PhetFont = require( 'SCENERY_PHET/PhetFont' );
+  const Range = require( 'DOT/Range' );
+  const RangeWithValue = require( 'DOT/RangeWithValue' );
+  const resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
+  const ResistanceInAWireA11yStrings = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireA11yStrings' );
+  const Util = require( 'DOT/Util' );
 
   // a11y strings
   var muchMuchSmallerThanString = ResistanceInAWireA11yStrings.muchMuchSmallerThanString.value;

js/resistance-in-a-wire/ResistanceInAWireScreen.js

@@ -6,16 +6,16 @@
  *
  * @author John Blanco (PhET Interactive Simulations)
  */
-define( function( require ) {
+define( require => {
   'use strict';
 
   // modules
-  var inherit = require( 'PHET_CORE/inherit' );
-  var Property = require( 'AXON/Property' );
-  var resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
-  var ResistanceInAWireModel = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/model/ResistanceInAWireModel' );
-  var ResistanceInAWireScreenView = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/view/ResistanceInAWireScreenView' );
-  var Screen = require( 'JOIST/Screen' );
+  const inherit = require( 'PHET_CORE/inherit' );
+  const Property = require( 'AXON/Property' );
+  const resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
+  const ResistanceInAWireModel = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/model/ResistanceInAWireModel' );
+  const ResistanceInAWireScreenView = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/view/ResistanceInAWireScreenView' );
+  const Screen = require( 'JOIST/Screen' );
 
   /**
    * @param {Tandem} tandem

js/resistance-in-a-wire/model/ResistanceInAWireModel.js

@@ -6,19 +6,19 @@
  * @author Vasily Shakhov (Mlearner)
  * @author John Blanco (PhET Interactive Simulations)
  */
-define( function( require ) {
+define( require => {
   'use strict';
 
   // modules
-  var BooleanProperty = require( 'AXON/BooleanProperty' );
-  var DerivedProperty = require( 'AXON/DerivedProperty' );
-  var DerivedPropertyIO = require( 'AXON/DerivedPropertyIO' );
-  var inherit = require( 'PHET_CORE/inherit' );
-  var NumberIO = require( 'TANDEM/types/NumberIO' );
-  var NumberProperty = require( 'AXON/NumberProperty' );
-  var Range = require( 'DOT/Range' );
-  var resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
-  var ResistanceInAWireConstants = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireConstants' );
+  const BooleanProperty = require( 'AXON/BooleanProperty' );
+  const DerivedProperty = require( 'AXON/DerivedProperty' );
+  const DerivedPropertyIO = require( 'AXON/DerivedPropertyIO' );
+  const inherit = require( 'PHET_CORE/inherit' );
+  const NumberIO = require( 'TANDEM/types/NumberIO' );
+  const NumberProperty = require( 'AXON/NumberProperty' );
+  const Range = require( 'DOT/Range' );
+  const resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
+  const ResistanceInAWireConstants = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireConstants' );
 
   /**
    * @param {Tandem} tandem

js/resistance-in-a-wire/view/AccessibleSummaryNode.js

@@ -8,18 +8,18 @@
  * @author Jesse Greenberg (PhET Interactive Simulations)
  */
 
-define( function( require ) {
+define( require => {
   'use strict';
 
   // modules
-  var AccessibleSectionNode = require( 'SCENERY_PHET/accessibility/AccessibleSectionNode' );
-  var inherit = require( 'PHET_CORE/inherit' );
-  var Node = require( 'SCENERY/nodes/Node' );
-  var resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
-  var ResistanceInAWireA11yStrings = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireA11yStrings' );
-  var ResistanceInAWireConstants = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireConstants' );
-  var StringUtils = require( 'PHETCOMMON/util/StringUtils' );
-  var Util = require( 'DOT/Util' );
+  const AccessibleSectionNode = require( 'SCENERY_PHET/accessibility/AccessibleSectionNode' );
+  const inherit = require( 'PHET_CORE/inherit' );
+  const Node = require( 'SCENERY/nodes/Node' );
+  const resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
+  const ResistanceInAWireA11yStrings = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireA11yStrings' );
+  const ResistanceInAWireConstants = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireConstants' );
+  const StringUtils = require( 'PHETCOMMON/util/StringUtils' );
+  const Util = require( 'DOT/Util' );
 
   // a11y strings
   var summarySimString = ResistanceInAWireA11yStrings.summarySimString.value;

js/resistance-in-a-wire/view/ControlPanel.js

@@ -6,39 +6,39 @@
  * @author Anton Ulyanov (Mlearner)
  * @author John Blanco (PhET Interactive Simulations)
  */
-define( function( require ) {
+define( require => {
   'use strict';
 
   // modules
-  var inherit = require( 'PHET_CORE/inherit' );
-  var Node = require( 'SCENERY/nodes/Node' );
-  var Panel = require( 'SUN/Panel' );
-  var resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
-  var ResistanceInAWireA11yStrings = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireA11yStrings' );
-  var ResistanceInAWireConstants = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireConstants' );
-  var ResistanceInAWireModel = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/model/ResistanceInAWireModel' );
-  var ResistanceSoundGenerator = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/view/ResistanceSoundGenerator' );
-  var SliderUnit = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/view/SliderUnit' );
-  var soundManager = require( 'TAMBO/soundManager' );
-  var StringUtils = require( 'PHETCOMMON/util/StringUtils' );
-  var Text = require( 'SCENERY/nodes/Text' );
-  var Util = require( 'DOT/Util' );
-  var Utterance = require( 'SCENERY_PHET/accessibility/Utterance' );
-  var utteranceQueue = require( 'SCENERY_PHET/accessibility/utteranceQueue' );
+  const inherit = require( 'PHET_CORE/inherit' );
+  const Node = require( 'SCENERY/nodes/Node' );
+  const Panel = require( 'SUN/Panel' );
+  const resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
+  const ResistanceInAWireA11yStrings = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireA11yStrings' );
+  const ResistanceInAWireConstants = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireConstants' );
+  const ResistanceInAWireModel = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/model/ResistanceInAWireModel' );
+  const ResistanceSoundGenerator = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/view/ResistanceSoundGenerator' );
+  const SliderUnit = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/view/SliderUnit' );
+  const soundManager = require( 'TAMBO/soundManager' );
+  const StringUtils = require( 'PHETCOMMON/util/StringUtils' );
+  const Text = require( 'SCENERY/nodes/Text' );
+  const Util = require( 'DOT/Util' );
+  const Utterance = require( 'SCENERY_PHET/accessibility/Utterance' );
+  const utteranceQueue = require( 'SCENERY_PHET/accessibility/utteranceQueue' );
 
   // strings
-  var areaString = require( 'string!RESISTANCE_IN_A_WIRE/area' );
-  var areaSymbolString = require( 'string!RESISTANCE_IN_A_WIRE/areaSymbol' );
-  var cmString = require( 'string!RESISTANCE_IN_A_WIRE/cm' );
-  var lengthString = require( 'string!RESISTANCE_IN_A_WIRE/length' );
-  var lengthSymbolString = require( 'string!RESISTANCE_IN_A_WIRE/lengthSymbol' );
-  var symbolOhmsString = require( 'string!SCENERY_PHET/symbol.ohms' );
-  var ohmString = require( 'string!RESISTANCE_IN_A_WIRE/ohm' );
-  var pattern0Label1Value2UnitsString = require( 'string!RESISTANCE_IN_A_WIRE/pattern.0label.1value.2units' );
-  var pattern0ResistanceUnits1LengthUnitsString = require( 'string!RESISTANCE_IN_A_WIRE/pattern.0resistanceUnits.1lengthUnits' );
-  var resistanceString = require( 'string!RESISTANCE_IN_A_WIRE/resistance' );
-  var resistivityString = require( 'string!RESISTANCE_IN_A_WIRE/resistivity' );
-  var symbolResistivityString = require( 'string!SCENERY_PHET/symbol.resistivity' );
+  const areaString = require( 'string!RESISTANCE_IN_A_WIRE/area' );
+  const areaSymbolString = require( 'string!RESISTANCE_IN_A_WIRE/areaSymbol' );
+  const cmString = require( 'string!RESISTANCE_IN_A_WIRE/cm' );
+  const lengthString = require( 'string!RESISTANCE_IN_A_WIRE/length' );
+  const lengthSymbolString = require( 'string!RESISTANCE_IN_A_WIRE/lengthSymbol' );
+  const symbolOhmsString = require( 'string!SCENERY_PHET/symbol.ohms' );
+  const ohmString = require( 'string!RESISTANCE_IN_A_WIRE/ohm' );
+  const pattern0Label1Value2UnitsString = require( 'string!RESISTANCE_IN_A_WIRE/pattern.0label.1value.2units' );
+  const pattern0ResistanceUnits1LengthUnitsString = require( 'string!RESISTANCE_IN_A_WIRE/pattern.0resistanceUnits.1lengthUnits' );
+  const resistanceString = require( 'string!RESISTANCE_IN_A_WIRE/resistance' );
+  const resistivityString = require( 'string!RESISTANCE_IN_A_WIRE/resistivity' );
+  const symbolResistivityString = require( 'string!SCENERY_PHET/symbol.resistivity' );
 
   // a11y strings (not ready for i18n)
   var resistivityUnitsPatternString = ResistanceInAWireA11yStrings.resistivityUnitsPatternString.value;

js/resistance-in-a-wire/view/DotsCanvasNode.js

@@ -7,18 +7,18 @@
  * 
  * @author Jesse Greenberg
  */
-define( function( require ) {
+define( require => {
   'use strict';
 
   // modules
-  var Bounds2 = require( 'DOT/Bounds2' );
-  var CanvasNode = require( 'SCENERY/nodes/CanvasNode' );
-  var inherit = require( 'PHET_CORE/inherit' );
-  var LinearFunction = require( 'DOT/LinearFunction' );
-  var resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
-  var ResistanceInAWireConstants = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireConstants' );
-  var Vector2 = require( 'DOT/Vector2' );
-  var WireShapeConstants = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/view/WireShapeConstants' );
+  const Bounds2 = require( 'DOT/Bounds2' );
+  const CanvasNode = require( 'SCENERY/nodes/CanvasNode' );
+  const inherit = require( 'PHET_CORE/inherit' );
+  const LinearFunction = require( 'DOT/LinearFunction' );
+  const resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
+  const ResistanceInAWireConstants = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireConstants' );
+  const Vector2 = require( 'DOT/Vector2' );
+  const WireShapeConstants = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/view/WireShapeConstants' );
 
   // constants
   // to calculate the number of dots

js/resistance-in-a-wire/view/FormulaNode.js

@@ -9,29 +9,29 @@
  * @author John Blanco (PhET Interactive Simulations)
  * @author Michael Kauzmann (PhET Interactive Simulations)
  */
-define( function( require ) {
+define( require => {
   'use strict';
 
   // modules
-  var inherit = require( 'PHET_CORE/inherit' );
-  var Node = require( 'SCENERY/nodes/Node' );
-  var Path = require( 'SCENERY/nodes/Path' );
-  var PhetFont = require( 'SCENERY_PHET/PhetFont' );
-  var platform = require( 'PHET_CORE/platform' );
-  var Rectangle = require( 'SCENERY/nodes/Rectangle' );
-  var resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
-  var ResistanceInAWireA11yStrings = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireA11yStrings' );
-  var ResistanceInAWireConstants = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireConstants' );
-  var Shape = require( 'KITE/Shape' );
-  var StringUtils = require( 'PHETCOMMON/util/StringUtils' );
-  var Text = require( 'SCENERY/nodes/Text' );
-  var Vector2 = require( 'DOT/Vector2' );
+  const inherit = require( 'PHET_CORE/inherit' );
+  const Node = require( 'SCENERY/nodes/Node' );
+  const Path = require( 'SCENERY/nodes/Path' );
+  const PhetFont = require( 'SCENERY_PHET/PhetFont' );
+  const platform = require( 'PHET_CORE/platform' );
+  const Rectangle = require( 'SCENERY/nodes/Rectangle' );
+  const resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
+  const ResistanceInAWireA11yStrings = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireA11yStrings' );
+  const ResistanceInAWireConstants = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireConstants' );
+  const Shape = require( 'KITE/Shape' );
+  const StringUtils = require( 'PHETCOMMON/util/StringUtils' );
+  const Text = require( 'SCENERY/nodes/Text' );
+  const Vector2 = require( 'DOT/Vector2' );
 
   // strings
-  var areaSymbolString = require( 'string!RESISTANCE_IN_A_WIRE/areaSymbol' );
-  var lengthSymbolString = require( 'string!RESISTANCE_IN_A_WIRE/lengthSymbol' );
-  var resistanceSymbolString = require( 'string!RESISTANCE_IN_A_WIRE/resistanceSymbol' );
-  var symbolResistivityString = require( 'string!SCENERY_PHET/symbol.resistivity' );
+  const areaSymbolString = require( 'string!RESISTANCE_IN_A_WIRE/areaSymbol' );
+  const lengthSymbolString = require( 'string!RESISTANCE_IN_A_WIRE/lengthSymbol' );
+  const resistanceSymbolString = require( 'string!RESISTANCE_IN_A_WIRE/resistanceSymbol' );
+  const symbolResistivityString = require( 'string!SCENERY_PHET/symbol.resistivity' );
 
   // a11y strings
   var resistanceEquationString = ResistanceInAWireA11yStrings.resistanceEquationString.value;

js/resistance-in-a-wire/view/ResistanceInAWireScreenView.js

@@ -6,24 +6,24 @@
  * @author Anton Ulyanov (Mlearner)
  * @author John Blanco (PhET Interactive Simulations)
  */
-define( function( require ) {
+define( require => {
   'use strict';
 
   // modules
-  var AccessibleSummaryNode = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/view/AccessibleSummaryNode' );
-  var ArrowNode = require( 'SCENERY_PHET/ArrowNode' );
-  var ControlPanel = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/view/ControlPanel' );
-  var FocusHighlightPath = require( 'SCENERY/accessibility/FocusHighlightPath' );
-  var FormulaNode = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/view/FormulaNode' );
-  var inherit = require( 'PHET_CORE/inherit' );
-  var ResetAllButton = require( 'SCENERY_PHET/buttons/ResetAllButton' );
-  var ResetAllSoundGenerator = require( 'TAMBO/sound-generators/ResetAllSoundGenerator' );
-  var resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
-  var ResistanceInAWireConstants = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireConstants' );
-  var ScreenView = require( 'JOIST/ScreenView' );
-  var Shape = require( 'KITE/Shape' );
-  var soundManager = require( 'TAMBO/soundManager' );
-  var WireNode = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/view/WireNode' );
+  const AccessibleSummaryNode = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/view/AccessibleSummaryNode' );
+  const ArrowNode = require( 'SCENERY_PHET/ArrowNode' );
+  const ControlPanel = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/view/ControlPanel' );
+  const FocusHighlightPath = require( 'SCENERY/accessibility/FocusHighlightPath' );
+  const FormulaNode = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/view/FormulaNode' );
+  const inherit = require( 'PHET_CORE/inherit' );
+  const ResetAllButton = require( 'SCENERY_PHET/buttons/ResetAllButton' );
+  const ResetAllSoundGenerator = require( 'TAMBO/sound-generators/ResetAllSoundGenerator' );
+  const resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
+  const ResistanceInAWireConstants = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireConstants' );
+  const ScreenView = require( 'JOIST/ScreenView' );
+  const Shape = require( 'KITE/Shape' );
+  const soundManager = require( 'TAMBO/soundManager' );
+  const WireNode = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/view/WireNode' );
 
   /**
    * @param {ResistanceInAWireModel} model

js/resistance-in-a-wire/view/SliderUnit.js

@@ -5,19 +5,19 @@
  * based on the center of the slider.
  * @author Martin Veillette (Berea College)
  */
-define( function( require ) {
+define( require => {
   'use strict';
 
   // modules
-  var Dimension2 = require( 'DOT/Dimension2' );
-  var inherit = require( 'PHET_CORE/inherit' );
-  var Node = require( 'SCENERY/nodes/Node' );
-  var resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
-  var ResistanceInAWireConstants = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireConstants' );
-  var RichText = require( 'SCENERY/nodes/RichText' );
-  var Text = require( 'SCENERY/nodes/Text' );
-  var Util = require( 'DOT/Util' );
-  var VSlider = require( 'SUN/VSlider' );
+  const Dimension2 = require( 'DOT/Dimension2' );
+  const inherit = require( 'PHET_CORE/inherit' );
+  const Node = require( 'SCENERY/nodes/Node' );
+  const resistanceInAWire = require( 'RESISTANCE_IN_A_WIRE/resistanceInAWire' );
+  const ResistanceInAWireConstants = require( 'RESISTANCE_IN_A_WIRE/resistance-in-a-wire/ResistanceInAWireConstants' );
+  const RichText = require( 'SCENERY/nodes/RichText' );
+  const Text = require( 'SCENERY/nodes/Text' );
+  const Util = require( 'DOT/Util' );
+  const VSlider = require( 'SUN/VSlider' );
 
   /**
    * @param {Property.<number>} property