public function addPurgeable($attributes = null)
    {
        $attributes = is_array($attributes) ? $attributes : func_get_args();

        $this->purgeable = array_merge($this->purgeable, $attributes);

        return $this;
    }
public function addPurgeable($attributes = null)
    {
        $attributes = is_array($attributes) ? $attributes : func_get_args();

        $this->purgeable = array_merge($this->purgeable, $attributes);

        return $this;
    }
public function addPurgeable ( $ attributes = null ) { $ attributes = is_array ( $ attributes ) ? $ attributes : func_get_args ( ) ; $ this -> purgeable = array_merge ( $ this -> purgeable , $ attributes ) ; return $ this ; }
Adds an attribute to the purgeable attributes list

@param  array|string|null $attributes

@return $this
Adds an attribute to the purgeable attributes list