@Override
  public void setContents(List<Content> contentsBefore, List<Content> contentsAfter) {
    for (int i = 0; i < contentsBefore.size(); i++) {
      Content content = contentsBefore.get(i);
      if (content instanceof TrimPathContent &&
          ((TrimPathContent) content).getType() == ShapeTrimPath.Type.SIMULTANEOUSLY) {
        TrimPathContent trimPath = (TrimPathContent) content;
        trimPaths.addTrimPath(trimPath);
        trimPath.addListener(this);
      } else if (content instanceof RoundedCornersContent) {
        roundedCornersAnimation = ((RoundedCornersContent) content).getRoundedCorners();
      }
    }
  }
This corner radius is from a layer item. The first one is from the roundedness on this specific rect.
lottie/src/main/java/com/airbnb/lottie/animation/content/RectangleContent.java