GapiSheetsV4Model.ChartHistogramRuleSourcetype t = {minValue : float;The minimum value at which items are placed into buckets. Values that are less than the minimum are grouped into a single bucket. If omitted, it is determined by the minimum item value.
*)maxValue : float;The maximum value at which items are placed into buckets. Values greater than the maximum are grouped into a single bucket. If omitted, it is determined by the maximum item value.
*)intervalSize : float;The size of the buckets that are created. Must be positive.
*)}