code: def reset(self, state):
      super(_TimerMetric, self).reset(state)
      self.t = time.time()
  
imports: from __future__ import print_function
  import sys
  import time
  from torchbearer.callbacks import Callback
  import torchbearer
  from torchbearer.metrics import Metric
label_desc: Use image node_id 3 for calling the _TimerMetric obj's underlying member method code with example usage: obj.reset(state) without return types