ensureNonZeroSpan method
Implementation
ChartCartesianBounds ensureNonZeroSpan() {
final nextMaxX = maxX <= minX ? minX + 1 : maxX;
final nextMaxY = maxY <= minY ? minY + 1 : maxY;
return ChartCartesianBounds(
minX: minX,
maxX: nextMaxX,
minY: minY,
maxY: nextMaxY,
);
}