def close_event(event):
    """
    Closes an event retrieved from Pilatus files.

    Since an event corresponds to a CBF data file, which does not need to be closed,
    this function actually does nothing.

    NOTE: This function is designed to be injected as a member function into an
    :class:`~onda.utils.data_event.DataEvent` object.

    Arguments:

        event (:class:`~onda.utils.data_event.DataEvent`): an object storing the event
            data.
    """
    del event
