def METHOD_NAME(self, blk_diag_a, blk_diag_b, atol=None):
    if atol is None:
        atol = utest_tolerance(self.dtype)
    close = True
    for blk_a, blk_b in zip(blk_diag_a, blk_diag_b):
        close = close and np.allclose(blk_a, blk_b, atol=atol)
    return close