code: def check_input_files_for_numbered_seq(sourceDir, suffix, containers):
      
      # Check input files for each MPL-container type.
      for container in containers:
          files = glob.glob( os.path.join( sourceDir, container, container + '*' + suffix ) )
          for currentFile in sorted( files ):
              if check_header_comment( currentFile ):
                  return True
      return False
docs: Check if files, used as input when pre-processing MPL-containers in their numbered form, need fixing.