code: def test__trunc__(parameter):
      """Test the __trunc__ magic method."""
      par, _ = parameter
      par.set(value=10.5)
      assert isinstance(trunc(par), int)
      assert_allclose(trunc(par), 10)
  
imports: from math import trunc
  import pickle
  import numpy
  from numpy.testing import assert_allclose
  import pytest
  import lmfit
label_desc: Use image node_id 30 for calling a global function with example usage: test__trunc__(parameter) without return types