在tensorflow.keras.experimental模型中的哪里可以找到export_saved_model属性？

import tensorflow as tf
from tensorflow.keras import layers

model = tf.keras.Sequential([
    layers.Dense(64, activation='relu', input_shape=(784,)),
    layers.Dense(10, activation='softmax')
])

model.compile(optimizer='adam',
              loss='sparse_categorical_crossentropy',
              metrics=['accuracy'])

model.fit(x_train, y_train, epochs=10)

export_path = '/path/to/exported/model'
tf.saved_model.save(model, export_path)