code: def fake_renderer_output(fig, Renderer):
      renderer = Renderer()
      exporter = Exporter(renderer)
      exporter.run(fig)
      return renderer.output
  
imports: import matplotlib
  import numpy
  import pytest
  from numpy.testing import assert_warns
  from packaging.version import Version
  from ..exporter import Exporter
  from ..renderers import FakeRenderer, FullFakeRenderer
  from .None import plt
label_desc: Use image node_id 1 for calling a global function with example usage: fake_renderer_output(fig, Renderer) and returns: renderer