func unpack(self: ClassicCall): UnpackedCall {....raises: [], tags: [], forbids: [].}

func unpack(self: CommandCall): UnpackedCall {....raises: [], tags: [], forbids: [].}

proc unpack(self: InfixCall): UnpackedCall {....raises: [], tags: [], forbids: [].}

func unpack(self: MethodCall): UnpackedCall {....raises: [], tags: [], forbids: [].}

proc unpack(self: PrefixCall): UnpackedCall {....raises: [], tags: [], forbids: [].}

proc unpack(self: SubscriptCall): UnpackedCall {....raises: [], tags: [],
    forbids: [].}