class_docstr: TimeProfiler to record the event and timestamp.
code: def time_record(self):
      return self._time_record
  
file_path: towhee/towhee/runtime/time_profiler.py
imports: import time
label_desc: Use image node_id 3 for calling the TimeProfiler obj's underlying member method code with example usage: obj.time_record() and returns: self