nw::kernel::sum_modifier
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.. doxygenfunction:: sum_modifier(const ObjectBase* obj, const ModifierType type)

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.. doxygenfunction:: sum_modifier(const ObjectBase* obj, const ModifierType type, const ObjectBase* versus)

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.. doxygenfunction:: sum_modifier(const ObjectBase* obj, const ModifierType type, SubType subtype)

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.. doxygenfunction:: sum_modifier(const ObjectBase* obj, const ModifierType type, SubType subtype, const ObjectBase* versus)