def METHOD_NAME():
    """dump/restore should preserve all attributes
    of `solph.components.Converter`"""
    test_optimise_storage_size()
    energysystem = solph.EnergySystem()
    energysystem.restore()
    trsf_attr_before_dump = sorted([x for x in dir(PP_GAS) if "__" not in x])
    trsf_attr_after_restore = sorted(
        [x for x in dir(energysystem.groups["pp_gas"]) if "__" not in x]
    )
    # Compare attributes before dump and after restore
    assert trsf_attr_before_dump == trsf_attr_after_restore