async forward(model_inputs) {
        return await this._forward(this, model_inputs);
    }
Forward method for a pretrained model. If not overridden by a subclass, the correct forward method
will be chosen based on the model type.
@param {Object} model_inputs The input data to the model in the format specified in the ONNX model.
@returns {Promise<Object>} The output data from the model in the format specified in the ONNX model.
@throws {Error} This method must be implemented in subclasses.