Convert const=>var, see https://github.com/phetsims/phet-io/issues/1404 and https://github.com/phetsims/chipper/issues/720
Convert const=>var, see https://github.com/phetsims/phet-io/issues/1404 and https://github.com/phetsims/chipper/issues/720

phetsims/phetmarks,phetsims/phetmarks