drawArc method
void
drawArc(])
/////////////////////////////////////////////////////////
Various drawing related Apis
/////////////////////////////////////////////////////////
Implementation
void drawArc(double x, double y, double r, double sAngle, double eAngle,
[bool useCenter = true]) {
var rect = Rect.fromCircle(center: Offset(x, y), radius: r);
this._addDrawList("drawArc", rect, sAngle, eAngle, useCenter);
}