At the moment the only data that can be passed to FloatingChartShape is a CellRange to be parsed to a chart. Some clients would like to use the IChartData implementations: NumericChartData and StringChartData. We need a FloatingChartShape constructors like this:

public FloatingChartShape(Worksheet worksheet, CellIndex cellIndex, IChartData values, IChartData categories)

And others if necessary.