public function clear_storage_on_remove_cart_item( $cart_item_key = '', $cart = null ) {
		$product_id = null;

		if ( $cart instanceof WC_Cart ) {
			$product    = $cart->cart_contents[ $cart_item_key ];
			$product_id = empty( $product['product_id'] ) ? null : $product['product_id'];
		}

		if ( ! is_null( $product_id ) ) {
			$this->storage->clear_meta_data_for( $product_id );
		}
	}