fix Demo notebook; got broken after plugin refactor
fix Demo notebook; got broken after plugin refactor


Former-commit-id: 944c2df3c882eef88beffa4ddde64c3b59d349d3
djtotten/workbench,SuperCowPowers/workbench,djtotten/workbench,SuperCowPowers/workbench,djtotten/workbench,SuperCowPowers/workbench