active() {
        return new ArgHandler('Cell.active')
            .case(() => {
                return this.sheet().activeCell() === this;
            })
            .case('boolean', active => {
                if (!active) throw new Error("Deactivating cell directly not supported. Activate a different cell instead.");
                this.sheet().activeCell(this);
                return this;
            })
            .handle(arguments);
    }
Make the cell the active cell in the sheet.
@param {boolean} active - Must be set to `true`. Deactivating directly is not supported. To deactivate, you should activate a different cell instead.
@returns {Cell} The cell.