Apply a stroke color to the previously drawn vector object.
Source
GraphicsCommandStrokeGradient strokeGradient(GraphicsGradient gradient, [
num width = 1.0,
JointStyle jointStyle = JointStyle.MITER,
CapsStyle capsStyle = CapsStyle.NONE]) {
var command = new GraphicsCommandStrokeGradient(gradient, width, jointStyle, capsStyle);
this.addCommand(command);
return command;
}