code: def rgb_image():
      im = Image.new("RGB", (8, 8))
      im.putpixel((4, 4), (255, 0, 0))
      im.putpixel((5, 5), (0, 255, 0))
      im.putpixel((6, 6), (0, 0, 255))
      return ImageReader(im)
  
file_path: OCRmyPDF/tests/test_pipeline.py
imports: from __future__ import annotations
  import warnings
  from unittest.mock import Mock
  import pytest
  from PIL import Image
  from reportlab.lib.units import inch
  from reportlab.lib.utils import ImageReader
  from reportlab.pdfgen.canvas import Canvas
  from ocrmypdf import _pipeline, pdfinfo
  from ocrmypdf.helpers import Resolution
label_desc: Use image node_id 1 for calling a global function with example usage: rgb_image() and returns: ImageReader