The AVLTree class implementation has two methods, one for left rotation, and another for right rotation. This means that:

The AVLTree class implementation has two methods, one for left rotation, and another for right rotation. This means that:

The double rotations are executed explicitly by calling a second single rotation after inserting a node.

There is no way to perform a double rotation in this implementation, and if these operations are needed the class will raise an exception.

The double rotations are executed implicitly by calling two single rotations within the insertion code.

There is no way to perform a double rotation in this implementation, and if these operations are needed the tree will remain unbalanced.