lookupAll :: ByteString -> MetadataMap -> Maybe (NE.NonEmpty ByteString)
lookupAll k (MetadataMap md) = NE.nonEmpty =<< M.lookup k md
lookupAll :: ByteString -> MetadataMap -> Maybe (NE.NonEmpty ByteString)
lookupAll k (MetadataMap md) = NE.nonEmpty =<< M.lookup k md
lookupAll k (MetadataMap md) = NE.nonEmpty =<< M.lookup k md