def test_proximity(rfl, ang):
    """Test if this close in chi and phi to another
    reflection."""
    rit = rfl.generate(0)
    r = next(rit)
    while r:
        if abs(r[1][2] - ang[2]) < 15 and abs(r[1][3]-ang[3]) < 15:
            return True
        r = next(rit)
    return False