src/MenuStyle.php
protected function calculateContentWidth() : void
    {
        $this->contentWidth = $this->width
            - ($this->paddingLeftRight * 2)
            - ($this->borderRightWidth + $this->borderLeftWidth);

        if ($this->contentWidth < 0) {
            $this->contentWidth = 0;
        }
    }
protected function calculateContentWidth() : void
    {
        $this->contentWidth = $this->width
            - ($this->paddingLeftRight * 2)
            - ($this->borderRightWidth + $this->borderLeftWidth);

        if ($this->contentWidth < 0) {
            $this->contentWidth = 0;
        }
    }
Calculate the contents width