Templatable = object
  replacements*: Table[string, string]
  fields*: seq[Table[string, string]]
  langBasedReps*: Table[string, Table[string, string]]
  langBasedMultireps*: Table[string, Table[string, HashSet[string]]]
  langBasedFields*: Table[string, seq[Table[string, string]]]

proc wingsToTemplatable(iwings: var IWings; tconfig: TConfig): Templatable {...}{.raises: [
    ValueError, GenericError, KeyError, UnsupportedCharacterError, Exception,
    ConflictingValueError, DuplicateKeyError], tags: [RootEffect].}