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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 get_collection_moderators(collection):
 """ Return the list of comment moderators for the given collection. """

    from invenio_access.engine import acc_get_authorized_emails

    res = list(
        acc_get_authorized_emails(
            'moderatecomments',
            collection=collection))
    if not res:
        return [CFG_WEBCOMMENT_DEFAULT_MODERATOR, ]
    return res