- Condition *merge_two(Condition *, Condition *, bool) const;
- Condition *add_merged_to(Condition *, CompoundCondition *, bool) const;
- Condition *merge_contents_to(CompoundCondition *, CompoundCondition *) const;
+ static Condition *merge_two(Condition *, Condition *, const CompoundCondition &, bool);
+ static Condition *add_merged_to(Condition *, CompoundCondition *, bool);
+ static Condition *merge_contents_to(CompoundCondition *, CompoundCondition *);