barchart.go
func (b *BarChart) SetValueWidth(width int32) {
	atomic.StoreInt32(&b.valueWidth, width)
}
func (b *BarChart) SetValueWidth(width int32) {
	atomic.StoreInt32(&b.valueWidth, width)
}
func ( b * BarChart ) SetValueWidth ( width int32 ) { atomic . StoreInt32 ( & b . valueWidth , width ) }
// SetValueWidth changes width of the value panel on the left
SetValueWidth changes width of the value panel on the left