yii\debug\Module::getYiiLogo PHP Method

    public static function getYiiLogo()
    {
        return self::$_yiiLogo;
    }

use yii\bootstrap\ButtonDropdown;
use yii\bootstrap\ButtonGroup;
use yii\helpers\Html;
use yii\helpers\Url;
$this->title = 'Yii Debugger';
?>
<div class="default-view">
    <div id="yii-debug-toolbar" class="yii-debug-toolbar yii-debug-toolbar_position_top" style="display: none;">
        <div class="yii-debug-toolbar__bar">
            <div class="yii-debug-toolbar__block yii-debug-toolbar__title">
                <a href="<?php 
echo Url::to(['index']);
?>
">
                    <img width="29" height="30" alt="" src="<?php 
echo \yii\debug\Module::getYiiLogo();
?>
">
                </a>
            </div>

            <?php 
foreach ($panels as $panel) {
    ?>
                <?php 
    echo $panel->getSummary();
    ?>
            <?php 
}
?>
        </div>