Multi bin neighbor list in liggghts

Hi,
I am trying to run a simulation with a wide disparity in particle sizes. For the same, I wanted to use the "neighbor binsize multi" option which would be more efficient then using a single bin size for all particles. However when I run the simulation with the "multi" option, no neighbour list is created. The "multi" option also seems missing in the neighbor_gran.cpp file. Has this option, which is available in lammps, not carried forward in liggghts?

Thanks,
Tapan