missing util package

Firstly, I installed the dependency of zomato in gardle.build file
```
implementation 'com.github.zomato:androidphotofilters:1.0.2'
```
And it is installed successfully but when I try to get ``` ThumbnailItem ``` from ``` com.zomato.photofilters.util.ThumbnailItem ``` I found that the utiil package is missed.