How to use the domdiv.draw.CardPlot.tabIncrementStart function in domdiv

CardPlot.cardHeight = cardHeight if cardHeight is not None else CardPlot.cardHeight
        CardPlot.tabWidth = tabWidth if tabWidth is not None else CardPlot.tabWidth
        CardPlot.tabHeight = tabHeight if tabHeight is not None else CardPlot.tabHeight
        CardPlot.lineType = lineType if lineType is not None else CardPlot.lineType
        CardPlot.tabStartSide = start if start is not None else CardPlot.tabStartSide
        CardPlot.tabSerpentine = serpentine if serpentine is not None else CardPlot.tabSerpentine
        CardPlot.wrapper = wrapper if wrapper is not None else CardPlot.wrapper
        # LEFT        tabs        RIGHT
        # +---+ +---+ +---+ +---+ +---+
        # | 1 | | 2 | | 3 | |...| | N |   Note: tabNumber = N, N >=1, 0 is for centred tabs
        # +   +-+   +-+   +-+   +-+   +

        # Setup first tab as well as starting point and direction of increment for tabs.
        if CardPlot.tabStartSide == CardPlot.RIGHT:
            CardPlot.tabStart = CardPlot.tabNumber
            CardPlot.tabIncrementStart = -1
        elif CardPlot.tabStartSide == CardPlot.CENTRE:
            # Get as close to centre as possible
            CardPlot.tabStart = (CardPlot.tabNumber + 1) // 2
            CardPlot.tabIncrementStart = 1
        else:
            # LEFT and anything else
            CardPlot.tabStartSide = CardPlot.LEFT
            CardPlot.tabStart = 1
            CardPlot.tabIncrementStart = 1

        if CardPlot.tabNumber == 1:
            CardPlot.tabIncrementStart = 0
        CardPlot.tabIncrement = CardPlot.tabIncrementStart

# Setup first tab as well as starting point and direction of increment for tabs.
        if CardPlot.tabStartSide == CardPlot.RIGHT:
            CardPlot.tabStart = CardPlot.tabNumber
            CardPlot.tabIncrementStart = -1
        elif CardPlot.tabStartSide == CardPlot.CENTRE:
            # Get as close to centre as possible
            CardPlot.tabStart = (CardPlot.tabNumber + 1) // 2
            CardPlot.tabIncrementStart = 1
        else:
            # LEFT and anything else
            CardPlot.tabStartSide = CardPlot.LEFT
            CardPlot.tabStart = 1
            CardPlot.tabIncrementStart = 1

        if CardPlot.tabNumber == 1:
            CardPlot.tabIncrementStart = 0
        CardPlot.tabIncrement = CardPlot.tabIncrementStart

# | 1 | | 2 | | 3 | |...| | N |   Note: tabNumber = N, N >=1, 0 is for centred tabs
        # +   +-+   +-+   +-+   +-+   +

        # Setup first tab as well as starting point and direction of increment for tabs.
        if CardPlot.tabStartSide == CardPlot.RIGHT:
            CardPlot.tabStart = CardPlot.tabNumber
            CardPlot.tabIncrementStart = -1
        elif CardPlot.tabStartSide == CardPlot.CENTRE:
            # Get as close to centre as possible
            CardPlot.tabStart = (CardPlot.tabNumber + 1) // 2
            CardPlot.tabIncrementStart = 1
        else:
            # LEFT and anything else
            CardPlot.tabStartSide = CardPlot.LEFT
            CardPlot.tabStart = 1
            CardPlot.tabIncrementStart = 1

        if CardPlot.tabNumber == 1:
            CardPlot.tabIncrementStart = 0
        CardPlot.tabIncrement = CardPlot.tabIncrementStart

if CardPlot.tabStartSide == CardPlot.RIGHT:
            CardPlot.tabStart = CardPlot.tabNumber
            CardPlot.tabIncrementStart = -1
        elif CardPlot.tabStartSide == CardPlot.CENTRE:
            # Get as close to centre as possible
            CardPlot.tabStart = (CardPlot.tabNumber + 1) // 2
            CardPlot.tabIncrementStart = 1
        else:
            # LEFT and anything else
            CardPlot.tabStartSide = CardPlot.LEFT
            CardPlot.tabStart = 1
            CardPlot.tabIncrementStart = 1

        if CardPlot.tabNumber == 1:
            CardPlot.tabIncrementStart = 0
        CardPlot.tabIncrement = CardPlot.tabIncrementStart