def METHOD_NAME(self, err_msg=None):
    print("\nERROR: ")
    if err_msg:
        print(err_msg)
    print("\nUsage: unity_test_summary.py result_file_directory/ root_path/")
    print("     result_file_directory - The location of your results files.")
    print("                             Defaults to current directory if not specified.")
    print("                             Should end in / if specified.")
    print("     root_path - Helpful for producing more verbose output if using relative paths.")
    sys.exit(1)