@Override
    public String toString() {
        return "PreFillSize{"
                + "width=" + width
                + ", height=" + height
                + ", config=" + config
                + ", weight=" + weight
                + '}';
    }
Returns the weight of the {@link Bitmap Bitmaps} of this type.
core/src/main/java/com/bumptech/glide/load/engine/prefill/PreFillType.java