A composite's component rendered DOM component should not be
considered a child of the composite component, but all of the rendered
DOM component's children should be. e.g. MyComponent > div should not
match MyComponent's root div component.
A DOM component with a composite child should match both a DOM
selector (div > button) and a composite selector (div > MyComponent).
MyComponent > divshould not matchMyComponent's rootdivcomponent.div > button) and a composite selector (div > MyComponent).