Question: Which XXX completes the insert _ after ( ) method in the Python LinkedList class for a doubly - linked list? def insert _ after

Which XXX completes the insert_after() method in the Python LinkedList class for a
doubly-linked list?
def insert_after(self, current_node, new_node):
if self.head is None:
self.head = new_node
self.tail = new_node
elif current_node is self.tail:
self.tail.next = new_node
new_node.prev = self.tail
self.tail = new_node
else:
successor_node = current_node.next
new_node.next = successor_node
new_node.prev = current_node
current_node.next = new_node
xxx
successor_node.next = new_node
successor_node.prev = new_node
current_node.prev = new_node
current_node.prev = successor_node
Which XXX completes the insert_after() method in the Python LinkedList class

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