If i have in Model .conf like:

matchers m = eval(p.sub_rule) && r.obj == p.obj && r.act == p.act

then in policy file the following stuff works: p, my_custom_func(r.sub.Age), /data1, read

BUT not the following kind of stuff: p, my_custom_func(r.sub.Age,r.sub.MaxAge), /data1, read

....because the policy file is splitted by the ',' (COMMA) and my_custom_func takes 2 parameters ...so it will be 1 more extra comma in policy row

Casbin: " panic: invalid policy size: ...."