code: def windows_process_priority_format(instance):
      
      class_suffix_re = re.compile(r'.+_CLASS$')
      for key, obj in instance['objects'].items():
          if 'type' in obj and obj['type'] == 'process':
              try:
                  priority = obj['extensions']['windows-process-ext']['priority']
              except KeyError:
                  continue
              if not class_suffix_re.match(priority):
                  yield JSONError("The 'priority' property of object '%s' should"
                                  " end in '_CLASS'." % key, instance['id'],
                                  'windows-process-priority-format')
docs: Ensure the 'priority' property of windows-process-ext ends in '_CLASS'.