class_docstr: A context object timer. Usage:
      >>> with Timer() as timer:
      ...     do_something()
      >>> print(timer.interval)
code: def __str__(self):
      return human_readable_time(self.interval)
  
imports: import time
label_desc: Use image node_id 4 for calling the Timer obj's underlying member method code with example usage: obj.__str__() and returns: human_readable_time