@classmethod
def all(cls, collection, skip=None, limit=None):
    """
            Returns all documents of the collection

            :param collection Collection instance
            :param skip  The number of documents to skip in the query
            :param limit The maximal amount of documents to return. The skip is applied before the limit restriction.

            :returns Document list
        """
    kwargs = {'skip': skip, 'limit': limit}
    return cls._construct_query(name='all', collection=collection, multiple
        =True, **kwargs)
