code: def readat(self, off):
          
          if isinstance(off, SV):
              off = off.value
  
          return self.__buff[off:]
docs: Read all bytes from the start of `off` until the end of the buffer
  
          This method can be used to determine a checksum of a buffer from a given
          point on.
  
          :param int off: starting offset
          :rtype: bytearray