headers :: [(HeaderName, ByteString)]
headers =
  [ ("Content-Type", "application/json")
  , ("X-Accept", "application/json")
  ]
headers :: [(HeaderName, ByteString)]
headers =
  [ ("Content-Type", "application/json")
  , ("X-Accept", "application/json")
  ]
headers =
  [ ("Content-Type", "application/json")
  , ("X-Accept", "application/json")
  ]