code: def test_hash_correctness():
      """Test that the hash of two equivalent measurement processes is the same."""
  
      class DummyMP(MeasurementProcess):
          """Dummy measurement process with no return type."""
  
      mp1 = DummyMP(wires=qml.wires.Wires(0))
      mp2 = DummyMP(wires=qml.wires.Wires(0))
  
      assert len({mp1, mp2}) == 1
      assert hash(mp1) == mp1.hash
      assert hash(mp2) == mp2.hash
      assert hash(mp1) == hash(mp2)
  
imports: import numpy
  import pytest
  import pennylane
  from pennylane.measurements import ClassicalShadowMP, Counts, CountsMP, Expectation, ExpectationMP, MeasurementProcess, MeasurementTransform, MeasurementValue, MidMeasure, MidMeasureMP, MutualInfoMP, PurityMP, Probability, ProbabilityMP, Sample, SampleMeasurement, SampleMP, ShadowExpvalMP, Shots, State, StateMeasurement, StateMP, Variance, VarianceMP, VnEntropyMP, expval, sample, var
  from pennylane.operation import DecompositionUndefinedError
  from pennylane.queuing import AnnotatedQueue
  from pennylane.wires import Wires
label_desc: Use image node_id 7 for calling a global function with example usage: test_hash_correctness() without return types