code: def test_prepare_template(self):
      # Test that prepare_template is a no-op
      templater = Templater()
      templater.prepare_template()
  
file_path: airflow/tests/template/test_templater.py
imports: from __future__ import annotations
  import jinja2
  from airflow.models.dag import DAG
  from airflow.template.templater import LiteralValue, Templater
  from airflow.utils.context import Context
label_desc: Use image node_id 2 for calling the TestTemplater obj's underlying member method code with example usage: obj.test_prepare_template() without return types