toXML method
Convert the Svg structure to XML string
Implementation
@override
String toXML() {
var xml = '<text x="${roundPixels(x, unit)}" y="${roundPixels(y, unit)}" '
'text-anchor="${textAnchor.xmlValue}" '
'font-size="${FontSize.toXml(fontSize)}" '
'dy="${alignmentY.xmlValue}" '
'${attributes(id, fill, stroke, strokeWidth, strokeDasharray, style, transform, unit, visibility)} >'
'$text'
'</text>';
return xml;
}