src/widgets/AdminPanelWidget.php
public function init()
    {
        Html::addCssClass($this->options, ['panel', 'sx-panel', $this->color]);

        $options = ArrayHelper::merge($this->options, [
            'id' => $this->id,
        ]);

        echo Html::beginTag('div', $options);

        echo Html::beginTag('div', $this->headingOptions);

        echo <<<HTML

                <div class="pull-left">
                    <h2>
                        {$this->name}
                    </h2>
                </div>
                <div class="panel-actions panel-hidden-actions">
                    {$this->actions}
                </div>
HTML;

        echo Html::endTag('div');

        echo Html::beginTag('div', $this->bodyOptions);

        //echo '<div class="panel-content">' . $this->content;
        echo $this->content;

    }
public function init()
    {
        Html::addCssClass($this->options, ['panel', 'sx-panel', $this->color]);

        $options = ArrayHelper::merge($this->options, [
            'id' => $this->id,
        ]);

        echo Html::beginTag('div', $options);

        echo Html::beginTag('div', $this->headingOptions);

        echo <<<HTML

                <div class="pull-left">
                    <h2>
                        {$this->name}
                    </h2>
                </div>
                <div class="panel-actions panel-hidden-actions">
                    {$this->actions}
                </div>
HTML;

        echo Html::endTag('div');

        echo Html::beginTag('div', $this->bodyOptions);

        //echo '<div class="panel-content">' . $this->content;
        echo $this->content;

    }
Initializes the widget.
This renders the form open tag.