code: def labels_blankid_to_last(labels, blank_index, num_class=None):
      """Change the value of blank_label elements from blank_index to num_class - 1"""
      assert num_class is not None, "The num_class should not be None!"
  
      labels = transform_preprocess(
          labels=labels, blank_index=blank_index, num_class=num_class
      )
  
      labels_values = labels.values
      labels_num_class = (
          tf.zeros_like(labels_values, dtype=tf.int32) + num_class
      )
      labels_values_change_blank = tf.where(
          tf.equal(labels_values, blank_index),
          labels_num_class,
          labels_values,
      )
      labels_values = tf.where(
          labels_values_change_blank < blank_index,
          labels_values_change_blank,
          labels_values_change_blank - 1,
      )
  
      labels = tf.SparseTensor(
          indices=labels.indices,
          values=labels_values,
          dense_shape=labels.dense_shape,
      )
      return labels
  
imports: import delta.compat
label_desc: Use image node_id 3 for calling a global function with example usage: labels_blankid_to_last(labels, blank_index, num_class) and returns: labels