Is it possible to set a header view crossing columns?

[hugogz]

Hi, i've been using this code for a while, but i can't find the way to create a header view which matchs the whole width of the StaggeredGridView. I would like to know if someone was able to implement it, and how to do it please.

I know that other StaggeredGridView libs or forks are able to do it, but since i've implemented my app with this one, i would like to stick to it if possible.

thanks in advance