code: def rmae(y_true, y_pred):
      from tensorflow.keras import backend as K
  
      return K.sqrt(K.mean(K.abs(y_pred - y_true), axis=-1))
  
file_path: talos/talos/metrics/keras_metrics.py
label_desc: Use image node_id 3 for calling a global function with example usage: rmae(y_true, y_pred) and returns: K