Remove read-only, to be set in overrides, see https://github.com/phetsims/energy-forms-and-changes/issues/216
Remove read-only, to be set in overrides, see https://github.com/phetsims/energy-forms-and-changes/issues/216

phetsims/energy-forms-and-changes,phetsims/energy-forms-and-changes,phetsims/energy-forms-and-changes