Lena Novokshonova b42d1415d8 Use None instead of mutables in method params default values
Mutables in the method params defaults might cause errors and
that's why it's anti-pattern in most of the cases and should be
removed.

Change-Id: Ib1498e68ab9cc770b237a324b733c85b4a5c6839
2014-09-19 13:52:53 +04:00
..