public Printer()
 {
     PaperAmount = 0;
     YellowInk   = new Ink(InkColor.Yellow);
     MagentaInk  = new Ink(InkColor.Magenta);
     CyanInk     = new Ink(InkColor.Cyan);
     BlackInk    = new Ink(InkColor.Black);
     OutOfPaper += OutOfPaperEventHandler;
     OutOfInk   += OutOfInkEventHandler;
 }
        private bool IsInkEnough(Ink ink)
        {
            bool enough = true;

            if (ink.Amount < 1)
            {
                OutOfInk?.Invoke(this, new OutOfInkEventArgs(ink.Color));
                enough = false;
            }

            return(enough);
        }