code: def test_givens(self):
      x = shared(0)
      assign = pfunc([], x, givens={x: 3})
      assert assign() == 3
      assert x.get_value(borrow=True) == 0
  
      y = ivector()
      f = pfunc([y], (y * x), givens={x: 6})
      assert np.all(f([1, 1, 1]) == [6, 6, 6])
      assert x.get_value() == 0
  
      z = ivector()
      c = z * y
      f = pfunc(
          [y], (c + 7), givens={z: _asarray([4, 4, 4], dtype="int32")}
      )
      assert np.all(f([1, 1, 1]) == [11, 11, 11])
      assert x.get_value() == 0
  
imports: import numpy
  import pytest
  import pytensor.tensor
  from pytensor.compile import UnusedInputError, get_mode
  from pytensor.compile.function import function, pfunc
  from pytensor.compile.function.pfunc import rebuild_collect_shared
  from pytensor.compile.io import In
  from pytensor.compile.sharedvalue import shared
  from pytensor.configdefaults import config
  from pytensor.graph.utils import MissingInputError
  from pytensor.misc.safe_asarray import _asarray
  from pytensor.tensor.math import sum
  from pytensor.tensor.type import bscalar, bvector, dmatrices, dmatrix, dscalar, dvector, fscalar, fvector, imatrix, iscalar, ivector, ivectors, lscalar, wvector
  from pytensor.utils import PYTHON_INT_BITWIDTH
label_desc: Use image node_id 18 for calling the TestPfunc obj's underlying member method code with example usage: obj.test_givens() without return types