take care of line numbers
safe delete: delete @Override annotation each time super method is deleted; rise a conflict when a usage is in overriding method which won't be deleted (IDEA-110840; IDEA-110841)
EA-47886 - IAE: TypeConversionUtil.isAssignable
assume that stubbed element has text range in order to avoid AST loading
+ java doc to getFirstItems
make it using subList