public function sync_original() {
		$this->original = $this->attributes;

		if ( $this->attributes[ self::OBJECT_KEY ] ) {
			$this->original[ self::OBJECT_KEY ] = clone $this->attributes[ self::OBJECT_KEY ];
		}

		foreach ( $this->original[ self::TABLE_KEY ] as $key => $item ) {
			if ( is_object( $item ) ) {
				$this->original[ $key ] = clone $item;
			}
		}

		return $this;
	}