SheetXL - v1.0.2
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    What the Create Sparklines dialog makes, as ICellRange.setSparkline takes it.

    interface NewSparklines {
        data: ICellRanges | null;
        location: ICellRanges | null;
        type: Type;
    }
    Index
    data: ICellRanges | null

    The cells the sparklines draw: one area, on any sheet.

    location: ICellRanges | null

    The cells they draw in: one cell, or one row or one column of cells.

    type: Type