ActionButtons not working in ActionGroup

[conormdowney]

I have the following code:

<Provider theme={defaultTheme}>
                <ActionGroup 
                    overflowMode="collapse" 
                    maxWidth={10}>
                    <ActionButton>Icon + Label</ActionButton>
                    <ActionButton>Icon + Label2</ActionButton>
                </ActionGroup>
               
            </Provider>

all i want it to do is render as the collapsed button and open to show those options when i click it. But instead my application blows up.
If I change the ActionButtons to Items it works fine. The ActionGroup page says it is a grouping of Action Buttons but then none of hte examples use ActionButtons. Can anyone tell me what Im doing wrong?

[LFDanLu]

ActionGroup follows the collections api and thus accepts Items or a function that returns Item. The ActionGroup component itself then handles rendering the ActionButtons internally.