Describe the current behavior

When getting connectables the ordering may be changed on a file roundtrip for bus-breaker voltage levels

Describe the expected behavior

When getting connectables the ordering should remain the same on any file roundtrip, or the documentation should clearly state it might be altered by a Network.copy (or writing/reading).

Describe the steps

• Checkout 268ae36
• Run the unit test ConnectableOrderingXmlTest::test

Environment

No response

Relevant Log Output

No response

Extra Information

No response