INTERFACE GameBoardPrivate;

IMPORT GameBoard;

This is an interface which gives access to an unique integer key for each board. This is not useful for any Modula-3 code, but is useful when using other languages

REVEAL GameBoard.T <: GameBoardPrivate;

TYPE
  GameBoardPrivate =
    GameBoard.Public OBJECT METHODS getKey (): INTEGER; END;

END GameBoardPrivate.