public Surface drawLine (XY a, XY b, float width) {
    return drawLine(a.x(), a.y(), b.x(), b.y(), width);
  }
public Surface drawLine ( XY a , XY b , float width ) { return drawLine ( a . x ( ) , a . y ( ) , b . x ( ) , b . y ( ) , width ) ; }
Fills a line between the specified coordinates, of the specified display unit width.