concrete/src/Page/Collection/Collection.php
public function resetAreaCustomStyle($area)
    {
        $db = Loader::db();
        $db->Execute(
            'delete from CollectionVersionAreaStyles where cID = ? and cvID = ? and arHandle = ?',
            [
                $this->getCollectionID(),
                $this->getVersionID(),
                $area->getAreaHandle(),
            ]
            );
    }
public function resetAreaCustomStyle($area)
    {
        $db = Loader::db();
        $db->Execute(
            'delete from CollectionVersionAreaStyles where cID = ? and cvID = ? and arHandle = ?',
            [
                $this->getCollectionID(),
                $this->getVersionID(),
                $area->getAreaHandle(),
            ]
            );
    }
public function resetAreaCustomStyle ( $ area ) { $ db = Loader :: db ( ) ; $ db -> Execute ( 'delete from CollectionVersionAreaStyles where cID = ? and cvID = ? and arHandle = ?' , [ $ this -> getCollectionID ( ) , $ this -> getVersionID ( ) , $ area -> getAreaHandle ( ) , ] ) ; }
Delete all the custom styles of an area of the currently loaded collection version.

@param \Concrete\Core\Area\Area $area
Delete all the custom styles of an area of the currently loaded collection version .