tandemOptional in Property.js, factor Optional/RequiredAndNotSupplied into required and supplied options, https://github.com/phetsims/scenery-phet/issues/26 2
tandemOptional in Property.js, factor Optional/RequiredAndNotSupplied into required and supplied options, https://github.com/phetsims/scenery-phet/issues/26 2

phetsims/tandem,phetsims/tandem,phetsims/tandem