fillPattern

Custom set of fill pattern, for Bar Chart type.

Type	Default
FillPattern Function(OrdinalGroup, OrdinalData, int?)?	FillPattern.solid

Type	Description
forwardHatch	Defines a pattern of white lines slanting up and to the right above the bar filled with the fill color
solid	Defines a simple bar filled with a fill color. This becomes the default pattern

fillPattern: (group, ordinalData, index) {
    if (ordinalData.measure > 8) return FillPattern.forwarHatch;
    return FillPattern.solid;
},