class_docstr: Test the new return types for multiple measurements, it should always return a tuple containing the single
  measurements.
docstr: Return multiple expvals.
code: def test_multiple_expval(self, device):
      """Return multiple expvals."""
      n_wires = 2
      dev = device(n_wires)
  
      obs1 = qml.Projector([0], wires=0)
      obs2 = qml.PauliZ(wires=1)
      func = qubit_ansatz
  
      def circuit(x):
          func(x)
          return qml.expval(obs1), qml.expval(obs2)
  
      qnode = qml.QNode(circuit, dev, diff_method=None)
      res = qnode(0.5)
  
      assert isinstance(res, tuple)
      assert len(res) == 2
  
      assert isinstance(res[0], np.ndarray)
      assert res[0].shape == ()
  
      assert isinstance(res[1], np.ndarray)
      assert res[1].shape == ()
  
file_path: pennylane/pennylane/devices/tests/test_return_system.py
imports: import pytest
  import pennylane
  from pennylane import numpy
label_desc: Use image node_id 1 for calling the TestIntegrationMultipleReturns obj's underlying member method code with example usage: obj.test_multiple_expval(device) and returns: qml,  qml