protected function initPanels()
{
// merge custom panels and core panels so that they are ordered mainly by custom panels
if (empty($this->panels)) {
$this->panels = $this->corePanels();
} else {
$corePanels = $this->corePanels();
foreach ($corePanels as $id => $config) {
if (isset($this->panels[$id])) {
unset($corePanels[$id]);
}
}
$this->panels = array_filter(array_merge($corePanels, $this->panels));
}
foreach ($this->panels as $id => $config) {
if (is_string($config)) {
$config = ['class' => $config];
}
$config['module'] = $this;
$config['id'] = $id;
$this->panels[$id] = Yii::createObject($config);
}
}