Rnadomize a variable inside a function

Hi,

I want to randomize a variable defined in a function. The function is inside a package.

I tried declaring a class inside the package and taking the instance of that class in the function.

But that didnt work out as the object needs to be static.

I tried randomization() function, but the problem is the variable "k" can only have 2 value ie (5,9).

function foo()

 int k;

 void'(randomize(k)) with {k==5;k==9;});  // I am getting randomization failure in this case.

endfunction

Let me know how can this be resolved.

Thanks.