code: def test_2553_2():
      doc = fitz.open(f"{scriptdir}/resources/test_2553-2.pdf")
      page = doc[0]
  
      # extract plain text, ensure that there are no 0xFFFD characters
      text = page.get_text()
      if fitz.mupdf_version_tuple >= (1, 23, 7):
          assert chr(0xFFFD) not in text
      else:
          # Bug not fixed in MuPDF.
          assert chr(0xFFFD) in text
  
imports: import io
  import os
  import fitz
  import pickle
label_desc: Use image node_id 40 for calling a global function with example usage: test_2553_2() without return types