[utils] Added new get method to QueryCache
The new get method enables the retrieval an item in the cache by specifying a
default value so that in the absence of an item for the key, the default value
is returned.
[MASTER]
load-plugins=cubicweb.pylintext
ignore=__pkginfo__
[MESSAGES CONTROL]
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[BASIC]
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[TYPECHECK]
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[CLASSES]
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# namedtuple public API.
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