bsl::unordered_set<ManagedAttribute, AttributeHash>::insert

Insert the specified value into this set if a key equivalent to value does not already exist in this set; otherwise, if a key equivalent to value already exists in this set, this method has no effect. Return an iterator referring to the (possibly newly inserted) value_type object in this set that is equivalent to value. The average and worst case complexity of this operation is not affected by the specified hint. This method requires that the (template parameter) type KEY be copy‐constructible into this set (see {Requirements on KEY}). The behavior is undefined unless hint is an iterator in the range [begin() .. end()] (both endpoints included). Note that hint is ignored (other than possibly asserting its validity in some build modes).