code: def call(self, y_true, y_pred):
      return (y_true - y_pred) ** 2
  
imports: import numpy
  import pytest
  from keras import backend
  from keras import losses
  from keras import ops
  from keras import testing
  from keras.losses.loss import Loss
label_desc: Use image node_id 1 for calling the ExampleLoss obj's underlying member method code with example usage: obj.call(y_true, y_pred) and returns: unknown