headerActions
Override the header actions. Return a fragment so your items appear inline.
const overrides = {
  headerActions: ({ children }) => (
    <>
      {children}
      <button>Click me</button>
    </>
  ),
};Props
| Prop | Example | Type | 
|---|---|---|
| children | <div /> | ReactNode | 
children
The default node for the header actions, which includes the default publish button.