docs: public boolean write(ImageOutputStream targetImageStream) throws IORuntimeException {
  		Assert.notBlank(this.targetImageType, "Target image type is blank !");
  		Assert.notNull(targetImageStream, "Target output stream is null !");
  
  		final BufferedImage targetImage = (null == this.targetImage) ? this.srcImage : this.targetImage;
  		Assert.notNull(targetImage, "Target image is null !");
  		
  		return ImgUtil.write(targetImage, this.targetImageType, targetImageStream, this.quality);
  	}