[FR] Customized Args

Hi, I am requesting you to suggest if there is anyway to pass poinetrs to class objects or pointers to char as argument to benchmar wrapper function. I am looking for something like
//Dummy class
class Demo
{
};

//function to benchmark
void play(Demo* ob, char* ch);

//wrapper
static void BM_play(benchmark::State& state)
{
for(auto _ : state)
{
play(state.range(0), state.range(1)); // Here I only know to pass int64
}
}

can you please help?