code: def test_missing_input(self):
      with pm.Model() as model:
          a = pm.Normal("a")
          b = pm.Normal("b", mu=a)
          c = a * b
  
      with pytest.raises(ValueError):
          (c_val,) = pm.gp.util.replace_with_values(
              [c], replacements={"a": 2, "x": 100}, model=model
          )
  
file_path: pymc/tests/gp/test_util.py
imports: import numpy
  import numpy.testing
  import pytensor.tensor
  import pytest
  import pymc
label_desc: Use image node_id 3 for calling the TestReplaceWithValues obj's underlying member method code with example usage: obj.test_missing_input() without return types