code: def rollapply(self, func, window=20, **kwargs):
          '''A generic :ref:`rolling function <rolling-function>`
          for function *func*.
          Same construct as :meth:`dynts.TimeSeries.apply` but with default
          ``window`` set to ``20``.
          '''
          return self.apply(func, window=window, **kwargsf rollapply(self, func, window=20, **kwargs):
          '''A generic :ref:`rolling function <rolling-function>`
          for function *func*.
          Same construct as :meth:`dynts.TimeSeries.apply` but with default
          ``window`` set to ``20``.
          '''
          return self.apply(func, window=window, **kwargs)
docs: A generic :ref:`rolling function <rolling-function>`
          for function *func*.
          Same construct as :meth:`dynts.TimeSeries.apply` but with default
          ``window`` set to ``20``.