Method _hidePlot

src/plotViewer/index.ts:463–469

(id: HttpgdPlotId)

        this._hidePlot(id);
    }
    protected _hidePlot(id: HttpgdPlotId): void {
        const msg: HidePlotMessage = {
            message: 'hidePlot',
            plotId: id
        };
        this.postWebviewMessage(msg);
    }

    public async closePlot(id?: HttpgdPlotId): Promise<void> {
        id ??= this.activePlot;