Mark PageCache::$library as protected
Mark PageCache::$library as protected

This variable should be accessed only via the getLibrary() method,
because it may not be initialized otherwise.

olsgreen/concrete5,mainio/concrete5,olsgreen/concrete5,concrete5/concrete5,haeflimi/concrete5,mlocati/concrete5,deek87/concrete5,rikzuiderlicht/concrete5,MrKarlDilkington/concrete5,haeflimi/concrete5,mainio/concrete5,hissy/concrete5,olsgreen/concrete5,biplobice/concrete5,jaromirdalecky/concrete5,haeflimi/concrete5,jaromirdalecky/concrete5,biplobice/concrete5,biplobice/concrete5,mainio/concrete5,hissy/concrete5,haeflimi/concrete5,biplobice/concrete5,MrKarlDilkington/concrete5,mlocati/concrete5,deek87/concrete5,mlocati/concrete5,concrete5/concrete5,jaromirdalecky/concrete5,hissy/concrete5,deek87/concrete5,concrete5/concrete5,rikzuiderlicht/concrete5,rikzuiderlicht/concrete5,MrKarlDilkington/concrete5,deek87/concrete5,jaromirdalecky/concrete5,hissy/concrete5,mlocati/concrete5,concrete5/concrete5