Base class for the server implementation of the service ModelService.
Service for performing CRUD operations on models.
Recommendation models contain all the metadata necessary to generate a set of
models for the `Predict()` API. A model is queried
indirectly via a ServingConfig, which associates a model with a
given Placement (e.g. Frequently Bought Together on Home Page).
This service allows you to do the following:
* Initiate training of a model.
* Pause training of an existing model.
* List all the available models along with their metadata.
* Control their tuning schedule.