code: def get_new_read_prologue(prologue):
      """Create mocked read_prologue() method."""
  
      def new_read_prologue(self):
          self.prologue = prologue
  
      return new_read_prologue
  
file_path: satpy/satpy/tests/reader_tests/test_seviri_l1b_hrit_setup.py
imports: from datetime import datetime
  from unittest import mock
  import numpy
  from satpy.readers.seviri_l1b_hrit import HRITMSGFileHandler, HRITMSGPrologueFileHandler
  from satpy.tests.reader_tests.test_seviri_base import ORBIT_POLYNOMIALS
label_desc: Use image node_id 2 for calling a global function with example usage: get_new_read_prologue(prologue) and returns: new_read_prologue