code: def test_basic(self):
      def f(l):
          """Docstring."""
          a = 1
          l += a
          return l
  
      tr = self.transform(f, functions)
  
      result = tr(CONSTANT)
      self.assertEqual(2, result)
      self.assertEqual("Docstring.", tr.__doc__)
  
file_path: DALI/dali/test/python/autograph/converters/test_functions.py
imports: from nvidia.dali._autograph.converters import functions
  from nvidia.dali._autograph.converters import return_statements
  from nvidia.dali._autograph.core import ag_ctx
  from nvidia.dali._autograph.core import converter
  from nvidia.dali._autograph.core import converter_testing
  from nvidia.dali._autograph.impl import api
label_desc: Use image node_id 1 for calling the FunctionTransformer obj's underlying member method code with example usage: obj.test_basic() and returns: l