## ChartSeriesGroup.doughnut_hole_size property Gets or sets the hole size of the parent doughnut chart as a percentage. ```python @property def doughnut_hole_size(self) -> int: ... @doughnut_hole_......categories = ['Category 1', 'Category 2', 'Category 3'] chart.series....categories=categories, values=[4, 2, 5]) # Format the Doughnut chart...