Carbon_Fields\Field\Complex_Field::set_layout PHP Method

    public function set_layout($layout)
    {
        $available_layouts = array(self::LAYOUT_GRID, self::LAYOUT_TABBED_HORIZONTAL, self::LAYOUT_TABBED_VERTICAL, self::LAYOUT_LIST);
        if ($layout === self::LAYOUT_TABBED) {
            // The library used to provide just one kind of tabs -- horizontal ones. Later vertical tabs were added.
            // So the "tabbed" name was renamed to "tabbed-horizontal" and "tabbed-vertical" layout was introduced.
            _doing_it_wrong(__METHOD__, sprintf(__('Complex field "%1$s" layout is deprecated, please use "%2$s" or "%3$s" instead.', 'carbon_fields'), self::LAYOUT_TABBED, self::LAYOUT_TABBED_HORIZONTAL, self::LAYOUT_TABBED_VERTICAL), null);
            $layout = self::LAYOUT_TABBED_HORIZONTAL;
        }
        if (!in_array($layout, $available_layouts)) {
            $error_message = 'Incorrect layout ``' . $layout . '" specified. ' . 'Available layouts: ' . implode(', ', $available_layouts);
            Incorrect_Syntax_Exception::raise($error_message);
        }
        if ($layout === self::LAYOUT_LIST) {
            _doing_it_wrong(__METHOD__, __('Complex field <code>' . self::LAYOUT_LIST . '</code> layout is deprecated, please use <code>set_width()</code> instead.', 'carbon_fields'), null);
        }
        $this->layout = $layout;
        return $this;
    }