public function get_item( $item_id, $load_from_db = true ) {
		if ( $load_from_db ) {
			return WC_Order_Factory::get_order_item( $item_id );
		}

		// Search for item id.
		if ( $this->items ) {
			foreach ( $this->items as $group => $items ) {
				if ( isset( $items[ $item_id ] ) ) {
					return $items[ $item_id ];
				}
			}
		}

		// Load all items of type and cache.
		$type = $this->data_store->get_order_item_type( $this, $item_id );

		if ( ! $type ) {
			return false;
		}

		$items = $this->get_items( $type );

		return ! empty( $items[ $item_id ] ) ? $items[ $item_id ] : false;
	}