def trace_data():
    pass


def log_error(msg):
    pass


def start_to_trace():
    pass


def post_trace_info():
    pass


def end_trace():
    pass

def trace_data():
    pass


def log_error(msg):
    pass


def start_to_trace():
    pass


def post_trace_info():
    pass


def end_trace():
    pass
