ActiveField.php
public function checkboxFilled($options = [], $enclosedByLabel = true)
    {
        Html::addCssClass($options, $this->checkboxFilledCssClass);
        return parent::checkbox($options, $enclosedByLabel);
    }
public function checkboxFilled($options = [], $enclosedByLabel = true)
    {
        Html::addCssClass($options, $this->checkboxFilledCssClass);
        return parent::checkbox($options, $enclosedByLabel);
    }
Renders filled in checkbox
@see http://materializecss.com/forms.html#checkbox
@param array $options
@param bool|true $enclosedByLabel
@return $this