class_docstr: Threaded Class to calculate average FPS based on time.perf_counter() python module
docstr: start and return Timer Threaded instance
code: def start(self):
      """
      start and return Timer Threaded instance
      """
      self.__timer = Thread(
          target=self.__timeit, name="FPS_Timer", args=()
      )
      self.__timer.daemon = True
      self.__timer.start()
      return self
  
file_path: vidgear/vidgear/tests/utils/fps.py
imports: import time
  import numpy
  from threading import Thread
label_desc: Use image node_id 2 for calling the FPS obj's underlying member method code with example usage: obj.start() and returns: self