@muskan_sethia If your srcDest.DestinationCellID and srcDest.SourceCellID are uint32, you can do something like
KeyToHash: func(key interface{}) (uint64, uint64) {
srcDest, _ := key.(models.SourceDestinationCellID)
return uint64(srcDest.DestinationCellID) << 32 | uint64(srcDest.SourceCellID), 0
}
But this is based on an assumption that your (DestinationCellID, SourceCellID) is unique.