What does this part of code do? void addRecord(Node *& head, Node *& tail, string name, double balance){     Node *newNode = new Node;     newNode->name = name;     newNode->balance = balance;     newNode->next = NULL;     newNode->prev = NULL;     // If list is empty, make newNode the first node     if(head == NULL){         head = newNode;         tail = newNode;     }     else{         Node *temp = head;         // Loop through list until temp->next is NULL         while(temp->next != NULL){             temp = temp->next;         }         temp->next = newNode;         newNode->prev = temp;         tail = newNode;     } } /*

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