`SectionHeader` (component)
===========================

A header component. The header can contain a title, actions via children, and an `EllipsisMenu` menu.

Props
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### `className`

- Type: String
- Default: null

Additional CSS classes.

### `menu`

- Type: (custom validator)
- Default: null

An `EllipsisMenu`, with filters used to control the content visible in this card

### `title`

- **Required**
- Type: One of type: string, node
- Default: null

The title to use for this card.