```---------------------------------------------------------------------
r122975 | tseaver | 2011-09-27 13:31:54 -0400 (Tue, 27 Sep 2011) | 1 line

Move to match order defined in IPickleCache.
```

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r122974 | tseaver | 2011-09-27 13:31:06 -0400 (Tue, 27 Sep 2011) | 1 line

Tolerate being handed irrelevant arguments.
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r122973 | tseaver | 2011-09-27 13:31:05 -0400 (Tue, 27 Sep 2011) | 1 line

Enable 'Timestamp' fallback to 'timestamp' when extension unavailable.
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r122972 | tseaver | 2011-09-27 13:31:04 -0400 (Tue, 27 Sep 2011) | 3 lines

Don't raise KeyError for OID collision w/ same value object.

Also, implement stub of 'update_object_size_estimation'.
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r122971 | tseaver | 2011-09-27 13:31:03 -0400 (Tue, 27 Sep 2011) | 1 line

Document additional picklecache methods.

It is used only in the doctests.

Those snippets now pass with both the Python and the C versions of Persistent.