asyncio.run() cannot be called from a running event loop in pysten code example

Example: asyncio.run() cannot be called from a running event loop from jupyterlab

import asyncio
def wait_for_change(widget, value):
    future = asyncio.Future()
    def getvalue(change):
        # make the new value available
        future.set_result(change.new)
        widget.unobserve(getvalue, value)
    widget.observe(getvalue, value)
    return future