code: def build(self, hp, dataset):
      """Build the `tf.data` input preprocessor.
  
      # Arguments
          hp: `HyperParameters` instance. The hyperparameters for building the
              a Preprocessor.
          dataset: tf.data.Dataset.
  
      # Returns
          an instance of Preprocessor.
      """
      raise NotImplementedError
  
imports: from autokeras.engine import named_hypermodel
label_desc: Use image node_id 1 for calling the HyperPreprocessor obj's underlying member method code with example usage: obj.build(hp, dataset) without return types