code: def reset_state(self):
      self.sum.assign(0.0)
      self.total.assign(0)
  
imports: import numpy
  from keras import backend
  from keras import initializers
  from keras import metrics
  from keras import ops
  from keras import testing
  from keras.metrics.metric import Metric
label_desc: Use image node_id 4 for calling the ExampleMetric obj's underlying member method code with example usage: obj.reset_state() without return types