(diagnostic
  (schema slovo.diagnostic)
  (version 1)
  (severity error)
  (code VariantConstructorArity)
  (message "enum constructor `Color.Red` takes no arguments")
  (file "<fixture>")
  (span
    (bytes 57 70)
    (range 7 3 7 16)
  )
  (expected "0")
  (found "1")
)