Dot notation for subcomponents, Example #52

Dot notation with React functional components
https://stackoverflow.com/questions/60883388/using-dot-notation-with-functional-component-in-typescript

another usage - whenever make a reusable component, attach .Examplefor quick usage help, experiment.
Add a props spread for overridable (optional, so provide actual values too)

export default function CheckboxDropdown() {}

CheckboxDropdown.Example = (props) => <CheckboxDropdown addRealisticProps {...props} />;