barchart.go
func (b *BarChart) SetAutoSize(auto bool) {
	b.mtx.Lock()
	defer b.mtx.Unlock()

	b.autosize = auto
}
func (b *BarChart) SetAutoSize(auto bool) {
	b.mtx.Lock()
	defer b.mtx.Unlock()

	b.autosize = auto
}
// SetAutoSize enables or disables automatic bar
// width calculation