Google Slides 폰트 일괄 변경 Script

function changeFont() {
  var slides = SlidesApp.getActivePresentation().getSlides();
  
  slides.forEach(function(slide) {
    var elements = slide.getPageElements();
    
    elements.forEach(function(element) {
      try {

        if (element.getPageElementType() === SlidesApp.PageElementType.SHAPE) {
          var shape = element.asShape();
          var text = shape.getText();
          
          if (text && text.asString().trim().length > 0) {
            text.getTextStyle().setFontFamily('언어');
          }

        }
      } catch (e) {

        Logger.log("err: " + e.message);

      }
    });
  });

  Logger.log("굿.");
}