Symbol = object
  name*: string
  parent*: string
  kind*: NimSymKind
  override*: string

OnSymbol = proc (sym: var Symbol) {...}{.cdecl.}

OnSymbolOverrideFinal = proc (typ: string): HashSet[string] {...}{.cdecl.}

cOverrides: Table[string, HashSet[string]]

proc onSymbolOverrideFinal(typ: string): HashSet[string] {...}{.exportc, dynlib,
    raises: [KeyError], tags: [].}