code: def gaussian_device(n_subsystems):
      """Number of qubits or modes."""
      return DummyDevice(wires=n_subsystems)
  
imports: import os
  import pathlib
  import numpy
  import pytest
  import pennylane
  from pennylane.devices import DefaultGaussian
label_desc: Use image node_id 13 for calling a global function with example usage: gaussian_device(n_subsystems) and returns: DummyDevice