isFiringProperty/PushButtonModel defaults out of the phetio state/methods. ResetAllButton opts into phetioMethods, https://github.com/phetsims/phet-io/issues/1225 https://github.com/phetsims/resistance-in-a-wire/issues/110
isFiringProperty/PushButtonModel defaults out of the phetio state/methods. ResetAllButton opts into phetioMethods, https://github.com/phetsims/phet-io/issues/1225 https://github.com/phetsims/resistance-in-a-wire/issues/110

phetsims/sun,phetsims/sun,phetsims/sun