Minimum number of times per lost message that a receiver transport
            transmitted a NAK. (LBT-RM, LBT-RU)
            
| C# | 
public long minimumNakTransmissions()
            Minimum number of times per lost message that a receiver transport
            transmitted a NAK, i.e., the lowest value collected so far.
            
            A value greater than 1 indicates a chronically lossy network.
            This method returns a value from the first
            set of statistics encapsulated within this object
            and would normally be used when the object has been
            created using a specific source to instantiate the class.