code: def test_missing(self):
      s, missing = get_interpolator().interpolate(
          "${{ env.name }}", return_missing=True
      )
      assert "" == s
      assert ["env.name"] == missing
  
file_path: dstack/src/tests/_internal/utils/test_interpolator.py
imports: import pytest
  from dstack._internal.utils.interpolator import VariablesInterpolator
label_desc: Use image node_id 7 for calling the TestVariablesInterpolator obj's underlying member method code with example usage: obj.test_missing() without return types