def METHOD_NAME(self):
    force_field = ForceField(smirnoff99Frosst_offxml_file_path)
    # Serialize/deserialize
    serialized_forcefield = force_field.__getstate__()
    force_field2 = ForceField.__setstate__(serialized_forcefield)
    assert_forcefields_equal(
        force_field,
        force_field2,
        "Deserialized serialized ForceField does not match original ForceField",
    )