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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def clear_current() -> None: """Clears the `IOLoop` for the current thread. Intended primarily for use by test frameworks in between tests. .. versionchanged:: 5.0 This method also clears the current `asyncio` event loop. """

        old = IOLoop.current(instance=False)
        if old is not None:
            old._clear_current_hook()
        if asyncio is None:
            IOLoop._current.instance = None