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�rF | �� �r$| �� Y W �dS | �|� t| |d�I dH � Y nX | �� �r^| �� W �*S | �|� t| |d�I dH t � � �W 5 |�� X dS )a� Wait for the single Future or coroutine to complete, with timeout.
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| �|d�S td��dS )zmWrap a coroutine or an awaitable in a future.
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� | d���S ) a� Return a future aggregating results from the given coroutines/futures.
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results, and gathered in the result list; otherwise, the first
raised exception will be immediately propagated to the returned
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