paintSlideLine method
Implementation
void paintSlideLine(
Canvas canvas, Size size, Offset noteOffset, Offset releaseOffset) {
final y = releaseOffset.dy - (chartPositioning.stringSpacing * .3);
final path = Path()
..moveTo(noteOffset.dx + 8, y)
..lineTo(releaseOffset.dx - 8, y);
canvas.drawPath(path, tabContext.techniquePaint);
}