def METHOD_NAME(self):
    ''' Return an array of length nslices, np.arange(nslices)
    Add the number of calls * 1000 to the array
    This makes it easy to compare the results
    '''
    self.counter += 1
    prop = np.arange(0, self.n_slices, 1, dtype=np.float64)
    prop += self.counter*1000
    return prop