Get a new representation of this object as an
        :class:`vtki.UnstructuredGrid`

def cast_to_unstructured_grid(self):
        """Get a new representation of this object as an
        :class:`vtki.UnstructuredGrid`
        """
        alg = vtk.vtkAppendFilter()
        alg.AddInputData(self)
        alg.Update()
        return vtki.filters._get_output(alg)