Consider using a real proxy in place of bases.Proxy

[pylint-bot]

Originally reported by: BitBucket: ceridwenv, GitHub: @ceridwen

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Now that we're using wrapt and lazy_object_proxy, would replacing bases.Proxy make sense? Even if we don't need the broader functionality, it would remove some code.

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• Bitbucket: https://bitbucket.org/logilab/astroid/issue/205

[pylint-bot]

Original comment by Claudiu Popa (BitBucket: PCManticore, GitHub: @PCManticore):

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Sounds fine to me.