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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 load_entry_point_system_roles(self, entry_point_group):
 """Load system roles from an entry point group. :param entry_point_group: The entrypoint for extensions. """

        for ep in pkg_resources.iter_entry_points(group=entry_point_group):
            self.register_system_role(ep.load())