(diagnostic
  (schema slovo.diagnostic)
  (version 1)
  (severity error)
  (code DuplicateEnumVariant)
  (message "duplicate variant `Red` in enum `Color`")
  (file "<fixture>")
  (span
    (bytes 32 35)
    (range 4 17 4 20)
  )
  (related
    (span
      (file "<fixture>")
      (bytes 28 31)
      (range 4 13 4 16)
      (message "original variant declaration")
    )
  )
)