class_docstr: Tests for the ``Wires`` class.
docstr: Tests the ``unique_wires()`` method.
code: def test_unique_wires_method(self):
      """Tests the ``unique_wires()`` method."""
  
      wires1 = Wires([4, 0, 1])
      wires2 = Wires([3, 0, 4])
      wires3 = Wires([4, 0])
      res = Wires.unique_wires([wires1, wires2, wires3])
      assert res == Wires([1, 3])
  
      res = Wires.unique_wires([wires2, wires1, wires3])
      assert res == Wires([3, 1])
  
      with pytest.raises(WireError, match="Expected a Wires object"):
          Wires.unique_wires([[2, 1], [8, 5]])
  
imports: import pytest
  import numpy
  import pennylane
  from pennylane.wires import Wires, WireError
label_desc: Use image node_id 30 for calling the TestWires obj's underlying member method code with example usage: obj.test_unique_wires_method() without return types