extend type RootMutation {
  """
  **BETA** Updates the properties of an existing `GuidelinePageHeading`. Requires `basic:write` scope to be accessible and `Project` permission level `EDIT`, or `TRANSLATE` when a `locale` or `language` is given.
  """
  updateGuidelinePageHeading(
    """**BETA** `UpdateGuidelinePageHeading` input argument."""
    input: UpdateGuidelinePageHeadingInput!
  ): UpdateGuidelinePageHeading
}