line method
Draw horizontal line
Implementation
void line({int thickness = 1}) {
_ensureHeight(runningHeight + thickness + 20);
fillRect(
utilImage,
x1: margin.left,
x2: paperSize.width - margin.right,
y1: runningHeight,
y2: runningHeight + thickness,
color: textColor,
);
runningHeight += thickness + 20;
}