### `Block`

Responsive page content container.

Props:

* string `title` - Page title
* string `description` - Page subtitle
* string `className` - Custom content classname
* bool `loading` - Whether to show loading indicator
* function `before` - Content to show above/before page title
* node `children` - Page content
* bool `wide` - Whether the block should take the full available width of the page (defaults to `false`)
* function `headerComponent` - Pass in a component to render at header level