Method UniqueInsert

tensorflow/core/kernels/unique_ali_op_util.h:266–272

      }

      inline void UniqueInsert(const T& key) {
        auto it = uniq_.emplace(key, next_index_);
        if (it.second) {
          inodes_.emplace_back(INode(next_index_, key));
          ++next_index_;
        }
      }

      inline const INode* GetINodeByPos(const TIndex pos) const {
        const INode* inode = &inodes_[pos];