code: def function_loader():
      """returns a FunctionLoader"""
      return loaders.FunctionLoader({"justfunction.html": "FOO"}.get)
  
file_path: catboost/contrib/python/Jinja2/py2/tests/conftest.py
imports: import os
  import pytest
  from jinja2 import Environment
  from jinja2 import loaders
  from jinja2.utils import have_async_gen
label_desc: Use image node_id 6 for calling a global function with example usage: function_loader() and returns: loaders