Save and re-load models configurations as JSON. Note that the representation does not include the weights, only the architecture.
model_to_json(object)model_from_json(json, custom_objects = NULL)
Model object to save
JSON with model configuration
Optional named list mapping names to custom classes or functions to be considered during deserialization.
Other model persistence: 
get_weights(),
model_to_yaml(),
save_model_hdf5(),
save_model_tf(),
save_model_weights_hdf5(),
serialize_model()