class_docstr: Cast the dataset shape to tf.int32.
code: def transform(self, dataset):
      return dataset.map(lambda x: tf.cast(x, tf.int32))
  
imports: import tensorflow
  from autokeras import analysers
  from autokeras import keras_layers
  from autokeras import preprocessors
  from autokeras.engine import preprocessor
  from autokeras.utils import data_utils
label_desc: Use image node_id 1 for calling the CastToInt32 obj's underlying member method code with example usage: obj.transform(dataset) and returns: dataset