artisan-1.x-dev/artisan_starterkit/components/header_alternative/header_alternative.component.yml

$schema: https://git.drupalcode.org/project/drupal/-/raw/HEAD/core/assets/schemas/v1/metadata.schema.json
name: Header
slots:
  top:
    title: Header top content
  content:
    title: Header content
props:
  type: object
  properties:
    attributes:
      type: Drupal\Core\Template\Attribute
      name: Attributes
      title: Attributes