func (gc *GraphicContext) newGroup(drawType drawType) *Group {
	group := Group{}
	// set attrs to group
	if drawType&stroked == stroked {
		group.Stroke = toSvgRGBA(gc.Current.StrokeColor)
		group.StrokeWidth = toSvgLength(gc.Current.LineWidth)
		group.StrokeLinecap = gc.Current.Cap.String()
		group.StrokeLinejoin = gc.Current.Join.String()
		if len(gc.Current.Dash) > 0 {
			group.StrokeDasharray = toSvgArray(gc.Current.Dash)
			group.StrokeDashoffset = toSvgLength(gc.Current.DashOffset)
		}
	}

	if drawType&filled == filled {
		group.Fill = toSvgRGBA(gc.Current.FillColor)
		group.FillRule = toSvgFillRule(gc.Current.FillRule)
	}

	group.Transform = toSvgTransform(gc.Current.Tr)

	// attach
	gc.svg.Groups = append(gc.svg.Groups, &group)

	return &group
}
func (gc *GraphicContext) newGroup(drawType drawType) *Group {
	group := Group{}
	// set attrs to group
	if drawType&stroked == stroked {
		group.Stroke = toSvgRGBA(gc.Current.StrokeColor)
		group.StrokeWidth = toSvgLength(gc.Current.LineWidth)
		group.StrokeLinecap = gc.Current.Cap.String()
		group.StrokeLinejoin = gc.Current.Join.String()
		if len(gc.Current.Dash) > 0 {
			group.StrokeDasharray = toSvgArray(gc.Current.Dash)
			group.StrokeDashoffset = toSvgLength(gc.Current.DashOffset)
		}
	}

	if drawType&filled == filled {
		group.Fill = toSvgRGBA(gc.Current.FillColor)
		group.FillRule = toSvgFillRule(gc.Current.FillRule)
	}

	group.Transform = toSvgTransform(gc.Current.Tr)

	// attach
	gc.svg.Groups = append(gc.svg.Groups, &group)

	return &group
}
// Creates new group from current context
// attach it to svg and return