Add phetioDesigned metadata attribute, and check it in phetioCompareAPI, see https://github.com/phetsims/phet-io/issues/1750
Add phetioDesigned metadata attribute, and check it in phetioCompareAPI, see https://github.com/phetsims/phet-io/issues/1750

phetsims/tandem,phetsims/tandem,phetsims/tandem