How to change the dropdown arrow's angle to face right handside.

Hi Awesome library i was searching for accordian kind of similar library and yours kind intriguingly matched my intuition but i need small tweaks on the lib ui like dropdown animation arrow should face right hand side how can i achieve it. and on clicking a title textview i should be able to expand the textview how can i do this. simple example would be i am looking for this

I am also interested in this.