code: def env():
      return NativeEnvironment()
  
imports: import math
  import pytest
  from jinja2.exceptions import UndefinedError
  from jinja2.nativetypes import NativeEnvironment
  from jinja2.nativetypes import NativeTemplate
  from jinja2.runtime import Undefined
label_desc: Use image node_id 1 for calling a global function with example usage: env() and returns: NativeEnvironment