code: def test_prefix_loader(self, prefix_loader):
      env = Environment(loader=prefix_loader)
      tmpl = env.get_template("a/test.html")
      assert tmpl.render().strip() == "BAR"
      tmpl = env.get_template("b/justdict.html")
      assert tmpl.render().strip() == "FOO"
      pytest.raises(TemplateNotFound, env.get_template, "missing")
  
imports: import os
  import shutil
  import sys
  import tempfile
  import time
  import weakref
  import pytest
  from jinja2 import Environment
  from jinja2 import loaders
  from jinja2._compat import PY2
  from jinja2._compat import PYPY
  from jinja2.exceptions import TemplateNotFound
  from jinja2.loaders import split_template_path
  import yatest.common
label_desc: Use image node_id 6 for calling the TestLoaders obj's underlying member method code with example usage: obj.test_prefix_loader(prefix_loader) without return types