Can the ObjectContainer class be removed?

[HannoSpreeuw]

@suvayu noticed that the ObjectContainer class has little more than a closest_to method which raises the question if this class could be removed.

I will try to find out what breaks in PySE and in TraP if we remove it.

[HannoSpreeuw]

I investigated TraP wrt the ObjectContainer class. It can be removed there and will be after this PR is merged.

[HannoSpreeuw]

The only two problems remaining are lines 56 and 92 in test_L15_12h_const.py.

There the closest_to method is tested.

But if we remove the closest_to method, we do not need to test it, i.e. we can remove those two unit tests, I would think.

[HannoSpreeuw]

An easy solution may be to add the closest_to method to the L15_12hConstObs class and to the L15_12hConstCor class.

Downside is that you have to add the same method twice.

[HannoSpreeuw]

Why is this closed?
I mean, the ObjectContainer class is still there.

[suvayu]

Not sure, I think it got closed automatically, or maybe I mistook it for another issue.