code: def get_fast_scanner(self):
          
          terms = self._terms
          return KronFastScanner(self._Y, self._mean.A, self._mean.X, self._cov.Ge, terms)
docs: Return :class:`.FastScanner` for association scan.
  
          Returns
          -------
          :class:`.FastScanner`
              Instance of a class designed to perform very fast association scan.