| emptyAfterRead | Set to trueto reset the underlying data counter to zero after calling this function. Set tofalseif you want each call to this function to return the running, cumulative total. | 
                  ulong
        Number of bytes of data read through systems other than the AsyncReadManager since you started metrics collection or you cleared this data counter by setting emptyAfterRead to true.
      
Returns the amount of data (in bytes) read through systems other than the AsyncReadManager.