How to fill the parameter of this FirebaseRecycleAdapter (... this field ...) {}?

I'm making an App where from the FireBase console I add content to the cardview of the App.

I have a problem, I do not know how to fill a certain field in the firebaseRecyclerAdapter. The code is as follows:

FirebaseRecyclerAdapter<Blog, BlogViewHolder> adapter 
= new FirebaseRecyclerAdapter<Blog, BlogViewHolder>(...options...¿aqui que hago???......) { 
Aqui empiezan los metodosOnBindViewHolder y OnCreatViwHolder
}