How would you use mixins in ES6 to enhance classes in a library, without modifying the original source code?

By directly modifying the source code of the original class.
By creating a new class that extends the original class and includes the desired mixins.
By using decorators to dynamically apply mixins to the original class.
By creating a higher-order function that adds mixins to the original class prototype.

To enhance classes in a library without modifying the source code, you can create a new class that extends the original class and includes the desired mixins. This follows the concept of class extension and composition.

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