gistfile1.java

class Player implements Restricted<Player> {
  @Getter
  final Permission<Player> permission =
      Alpha.let("connect").raiseIf("You are banned", this::isBanned)
                          .raiseIf("Already playing", this::isAlreadyPlaying)
           .let("move").raiseIf("You are jailed", this::isJailed)
                       .raiseIf("Too heavy", this::isTooHeavy)
           .let("move:teleport").raiseUnless("You are not an admin", this::isAdmin)
      ;
  ;
}

player.must("move:teleport");
player.teleportTo(BONTA);