docs: public void extractScaleTransform(Transformation2D scale,
  			Transformation2D rotateNshearNshift) {
  
  		scale.setScale(Math.sqrt(xx * xx + xy * xy),
  				Math.sqrt(yx * yx + yy * yy));
  		rotateNshearNshift.setScale(1.0 / scale.xx, 1.0 / scale.yy);
  		rotateNshearNshift.multiply(this);
  	}