@Override
    public int hashCode() {
        int result = width;
        result = 31 * result + height;
        result = 31 * result + config.hashCode();
        result = 31 * result + weight;
        return result;
    }
Returns the weight of the {@link Bitmap Bitmaps} of this type.
core/src/main/java/com/bumptech/glide/load/engine/prefill/PreFillType.java