public SVGPath relativeCubicTo(double c1x, double c1y, double c2x, double c2y, double x, double y) {
    return append(PATH_CUBIC_TO_RELATIVE).append(c1x).append(c1y).append(c2x).append(c2y).append(x).append(y);
  }
public SVGPath relativeCubicTo ( double c1x , double c1y , double c2x , double c2y , double x , double y ) { return append ( PATH_CUBIC_TO_RELATIVE ) . append ( c1x ) . append ( c1y ) . append ( c2x ) . append ( c2y ) . append ( x ) . append ( y ) ; }
Cubic Bezier line to the given relative coordinates.

@param c1x first control point x
@param c1y first control point y
@param c2x second control point x
@param c2y second control point y
@param x new coordinates
@param y new coordinates
@return path object, for compact syntax.