Use phet.joist.sim.allScreensCreated to determine when to run validation (if otherwise enabled), see https://github.com/phetsims/tandem/issues/195
Use phet.joist.sim.allScreensCreated to determine when to run validation (if otherwise enabled), see https://github.com/phetsims/tandem/issues/195

phetsims/tandem,phetsims/tandem,phetsims/tandem