code: def test_rgb(tmp_path):
      # Arrange
      mode = "RGB"
  
      # Act / Assert
      helper_save_as_pdf(tmp_path, mode)
  
imports: import io
  import os
  import os.path
  import tempfile
  import time
  import pytest
  from PIL import Image, PdfParser
  from .helper import hopper, mark_if_feature_version
label_desc: Use image node_id 4 for calling a global function with example usage: test_rgb(tmp_path) without return types