How can I retrieve the value of the number of generations in Genetic algorithm??

I have set the Generations = 10.

Now, I started the ga(). At first time, of course, the value of generations is 1. We call the Fitnessfunction in ga() i.e. ga(Fitnessfunction, nvar, myfit_func). I want to retrieve that "generation value 1" inside my Fitnessfunction. After Fitnessfunction executed, we will get the new population. At this time, the value of generation will become 2, now I have to use that value 2 inside my Fitnessfunction and so on up till 10

How can I do that?? I want to retrieve the value of generation for each iteration and have to use it in my Fitnessfunction. But ga() doesn't allow me to do that. I tried the "gen = Output .generation" inside the Fitnessfunction, but failed.