code: def setup_method(self):
      self.rgb_mode = "RGB"
  
imports: import io
  import re
  import sys
  import pytest
  from PIL import Image, WebPImagePlugin, features
  from .helper import assert_image_similar, assert_image_similar_tofile, hopper, skip_unless_feature
label_desc: Use image node_id 1 for calling the TestFileWebp obj's underlying member method code with example usage: obj.setup_method() without return types