(diagnostic
  (schema slovo.diagnostic)
  (version 1)
  (severity error)
  (code SelfTypeAlias)
  (message "type alias `Count` directly aliases itself")
  (file "<fixture>")
  (span
    (bytes 28 33)
    (range 4 13 4 18)
  )
  (hint "point the alias at an existing concrete type")
)