def get_all_keys(self, headers=None, callback=None, **params):
        """
        A lower-level method for listing contents of a bucket.
        This closely models the actual S3 API and requires you to manually
        handle the paging of results.  For a higher-level method
        that handles the details of paging for you, you can use the list method.
        
        :type max_keys: int
        :param max_keys: The maximum number of keys to retrieve
        
        :type prefix: string
        :param prefix: The prefix of the keys you want to retrieve
        
        :type marker: string
        :param marker: The "marker" of where you are in the result set
        
        :type delimiter: string 
        :param delimiter: If this optional, Unicode string parameter
                          is included with your request, then keys that
                          contain the same string between the prefix and
                          the first occurrence of the delimiter will be
                          rolled up into a single result element in the
                          CommonPrefixes collection. These rolled-up keys
                          are not returned elsewhere in the response.

        :rtype: ResultSet
        :return: The result from S3 listing the keys requested
        
        """
        return self._get_all([('Contents', self.key_class),
                              ('CommonPrefixes', boto.s3.prefix.Prefix)],
                              '', headers, callback=callback, **params)
A lower-level method for listing contents of a bucket.
        This closely models the actual S3 API and requires you to manually
        handle the paging of results.  For a higher-level method
        that handles the details of paging for you, you can use the list method.
        
        :type max_keys: int
        :param max_keys: The maximum number of keys to retrieve
        
        :type prefix: string
        :param prefix: The prefix of the keys you want to retrieve
        
        :type marker: string
        :param marker: The "marker" of where you are in the result set
        
        :type delimiter: string 
        :param delimiter: If this optional, Unicode string parameter
                          is included with your request, then keys that
                          contain the same string between the prefix and
                          the first occurrence of the delimiter will be
                          rolled up into a single result element in the
                          CommonPrefixes collection. These rolled-up keys
                          are not returned elsewhere in the response.

        :rtype: ResultSet
        :return: The result from S3 listing the keys requested