barchart.go
func (b *BarChart) SetShowTitles(show bool) {
	b.mtx.Lock()
	defer b.mtx.Unlock()

	b.showTitles = show
}
func (b *BarChart) SetShowTitles(show bool) {
	b.mtx.Lock()
	defer b.mtx.Unlock()

	b.showTitles = show
}
// SetShowTitles turns on and off horizontal axis and bar titles