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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_all_role_config_groups(self):
 """ Get a list of role configuration groups in the service. @return: A list of ApiRoleConfigGroup objects. @since: API v3 """

    return role_config_groups.get_all_role_config_groups(
        self._get_resource_root(), self.name, self._get_cluster_name())