(diagnostic
  (schema slovo.diagnostic)
  (version 1)
  (severity error)
  (code UnknownVariantConstructor)
  (message "enum `Color` has no variant `Blue`")
  (file "<fixture>")
  (span
    (bytes 58 68)
    (range 7 4 7 14)
  )
  (expected "one of Red")
)