src/widget/Column.php
protected function initOptions()
    {
        if($this->grid){
            $this->options = array_merge([
            'class' => $this->getGridClass().isset($this->options['class']) ? ' '.$this->options['class'] : '',
            ], $this->options);
        }else{
            $this->options = array_merge([
            'class' => self::DEFAULT_TYPE.self::SIZE_DEFAULT,
            ], $this->options);
        }
    }
protected function initOptions()
    {
        if($this->grid){
            $this->options = array_merge([
            'class' => $this->getGridClass().isset($this->options['class']) ? ' '.$this->options['class'] : '',
            ], $this->options);
        }else{
            $this->options = array_merge([
            'class' => self::DEFAULT_TYPE.self::SIZE_DEFAULT,
            ], $this->options);
        }
    }
Initializes the widget options.
This method sets the default values for various options.