async load() {
        if (this.loadOptions.streamWeights) return this.loadStream();
        const modelJSON = await this.loadModelJSON();
        return (0, _ioUtils.getModelArtifactsForJSON)(modelJSON, (weightsManifest)=>this.loadWeights(weightsManifest));
    }
Load model artifacts via HTTP request(s).

See the documentation to `tf.io.http` for details on the saved
artifacts.

@returns The loaded model artifacts (if loading succeeds).