Refactoring 6.
Refactoring 6.

blankme/easyloggingpp,spqr33/easyloggingpp,lisong521/easyloggingpp,spqr33/easyloggingpp,dreal-deps/easyloggingpp,arvidsson/easyloggingpp,utiasASRL/easyloggingpp,spthaolt/easyloggingpp,simonhang/easyloggingpp,spthaolt/easyloggingpp,hellowshinobu/easyloggingpp,arvidsson/easyloggingpp,simonhang/easyloggingpp,chenmusun/easyloggingpp,utiasASRL/easyloggingpp,dreal-deps/easyloggingpp,lisong521/easyloggingpp,utiasASRL/easyloggingpp,simonhang/easyloggingpp,chenmusun/easyloggingpp,spqr33/easyloggingpp,arvidsson/easyloggingpp,chenmusun/easyloggingpp,blankme/easyloggingpp,lisong521/easyloggingpp,hellowshinobu/easyloggingpp,hellowshinobu/easyloggingpp,blankme/easyloggingpp,dreal-deps/easyloggingpp,spthaolt/easyloggingpp