extend type RootQuery {
  """
  **BETA** Retrieve a single `Guideline` navigation item by the Id of any navigation item type. Returns `null` when the
  item does not exist or is not visible to the requester.
  """
  guidelineNavigationItem(
    """**BETA** Id of any `Guideline` navigation item."""
    id: ID!
    """
    **BETA** Language code the navigation item is read in, e.g. `EN` or `DE`.
    """
    language: String = null
  ): GuidelineNavigationItem
}