upDownArrowAction(e) {
        if (this.formulaMode ||
            this.settings.readOnly || this.domElement.readOnly || this.domElement.disabled) {
            return;
        }

        let isUp = false;
        let isDown = false;
        if (this.eventKey === AutoNumericEnum.keyName.UpArrow) {
            isUp = true;
        } else if (this.eventKey === AutoNumericEnum.keyName.DownArrow) {
            isDown = true;
        } else {
            AutoNumericHelper.throwError('Something has gone wrong since neither an Up or Down arrow key is detected, but the function was still called!');
        }

        this._wheelAndUpDownActions(e, isUp, isDown, this.settings.upDownStep);
    }
Handler for up and down arrow keys
Increment or decrement the element value according to the `upDownStep` option chosen

@param {KeyboardEvent} e