code: def test_dumps_loads_parameters(parameters):
      """Test for dumps and loads methods for a Parameters class."""
      pars, _, _ = parameters
  
      dumps = pars.dumps()
      assert isinstance(dumps, str)
      newpars = lmfit.Parameters().loads(dumps)
      assert newpars == pars
  
      newpars["a"].value = 100.0
      assert_allclose(newpars["b"].value, 200.0)
  
imports: from copy import copy, deepcopy
  import os
  import pickle
  import numpy
  from numpy.testing import assert_allclose
  import pytest
  import lmfit
  from lmfit.models import VoigtModel
label_desc: Use image node_id 25 for calling a global function with example usage: test_dumps_loads_parameters(parameters) without return types