protected function save_variations_data( $product, $request ) {
		foreach ( $request['variations'] as $menu_order => $data ) {
			$variation = new WC_Product_Variation( isset( $data['id'] ) ? absint( $data['id'] ) : 0 );

			// Create initial name and status.
			if ( ! $variation->get_slug() ) {
				/* translators: 1: variation id 2: product name */
				$variation->set_name( sprintf( __( 'Variation #%1$s of %2$s', 'woocommerce' ), $variation->get_id(), $product->get_name() ) );
				$variation->set_status( isset( $data['visible'] ) && false === $data['visible'] ? 'private' : 'publish' );
			}

			// Parent ID.
			$variation->set_parent_id( $product->get_id() );

			// Menu order.
			$variation->set_menu_order( $menu_order );

			// Status.
			if ( isset( $data['visible'] ) ) {
				$variation->set_status( false === $data['visible'] ? 'private' : 'publish' );
			}

			// SKU.
			if ( isset( $data['sku'] ) ) {
				$variation->set_sku( wc_clean( $data['sku'] ) );
			}

			// Thumbnail.
			if ( isset( $data['image'] ) && is_array( $data['image'] ) ) {
				$image = $data['image'];
				$image = current( $image );
				if ( is_array( $image ) ) {
					$image['position'] = 0;
				}

				$variation = $this->set_product_images( $variation, array( $image ) );
			}

			// Virtual variation.
			if ( isset( $data['virtual'] ) ) {
				$variation->set_virtual( $data['virtual'] );
			}

			// Downloadable variation.
			if ( isset( $data['downloadable'] ) ) {
				$variation->set_downloadable( $data['downloadable'] );
			}

			// Downloads.
			if ( $variation->get_downloadable() ) {
				// Downloadable files.
				if ( isset( $data['downloads'] ) && is_array( $data['downloads'] ) ) {
					$variation = $this->save_downloadable_files( $variation, $data['downloads'] );
				}

				// Download limit.
				if ( isset( $data['download_limit'] ) ) {
					$variation->set_download_limit( $data['download_limit'] );
				}

				// Download expiry.
				if ( isset( $data['download_expiry'] ) ) {
					$variation->set_download_expiry( $data['download_expiry'] );
				}
			}

			// Shipping data.
			$variation = $this->save_product_shipping_data( $variation, $data );

			// Stock handling.
			if ( isset( $data['manage_stock'] ) ) {
				$variation->set_manage_stock( $data['manage_stock'] );
			}

			if ( isset( $data['in_stock'] ) ) {
				$variation->set_stock_status( true === $data['in_stock'] ? 'instock' : 'outofstock' );
			}

			if ( isset( $data['backorders'] ) ) {
				$variation->set_backorders( $data['backorders'] );
			}

			if ( $variation->get_manage_stock() ) {
				if ( isset( $data['stock_quantity'] ) ) {
					$variation->set_stock_quantity( $data['stock_quantity'] );
				} elseif ( isset( $data['inventory_delta'] ) ) {
					$stock_quantity  = wc_stock_amount( $variation->get_stock_quantity() );
					$stock_quantity += wc_stock_amount( $data['inventory_delta'] );
					$variation->set_stock_quantity( $stock_quantity );
				}
			} else {
				$variation->set_backorders( 'no' );
				$variation->set_stock_quantity( '' );
			}

			// Regular Price.
			if ( isset( $data['regular_price'] ) ) {
				$variation->set_regular_price( $data['regular_price'] );
			}

			// Sale Price.
			if ( isset( $data['sale_price'] ) ) {
				$variation->set_sale_price( $data['sale_price'] );
			}

			if ( isset( $data['date_on_sale_from'] ) ) {
				$variation->set_date_on_sale_from( $data['date_on_sale_from'] );
			}

			if ( isset( $data['date_on_sale_to'] ) ) {
				$variation->set_date_on_sale_to( $data['date_on_sale_to'] );
			}

			// Tax class.
			if ( isset( $data['tax_class'] ) ) {
				$variation->set_tax_class( $data['tax_class'] );
			}

			// Description.
			if ( isset( $data['description'] ) ) {
				$variation->set_description( wp_kses_post( $data['description'] ) );
			}

			// Update taxonomies.
			if ( isset( $data['attributes'] ) ) {
				$attributes = array();
				$parent_attributes = $product->get_attributes();

				foreach ( $data['attributes'] as $attribute ) {
					$attribute_id   = 0;
					$attribute_name = '';

					// Check ID for global attributes or name for product attributes.
					if ( ! empty( $attribute['id'] ) ) {
						$attribute_id   = absint( $attribute['id'] );
						$attribute_name = wc_attribute_taxonomy_name_by_id( $attribute_id );
					} elseif ( ! empty( $attribute['name'] ) ) {
						$attribute_name = sanitize_title( $attribute['name'] );
					}

					if ( ! $attribute_id && ! $attribute_name ) {
						continue;
					}

					if ( ! isset( $parent_attributes[ $attribute_name ] ) || ! $parent_attributes[ $attribute_name ]->get_variation() ) {
						continue;
					}

					$attribute_key   = sanitize_title( $parent_attributes[ $attribute_name ]->get_name() );
					$attribute_value = isset( $attribute['option'] ) ? wc_clean( stripslashes( $attribute['option'] ) ) : '';

					if ( $parent_attributes[ $attribute_name ]->is_taxonomy() ) {
						// If dealing with a taxonomy, we need to get the slug from the name posted to the API.
						$term = get_term_by( 'name', $attribute_value, $attribute_name );

						if ( $term && ! is_wp_error( $term ) ) {
							$attribute_value = $term->slug;
						} else {
							$attribute_value = sanitize_title( $attribute_value );
						}
					}

					$attributes[ $attribute_key ] = $attribute_value;
				}

				$variation->set_attributes( $attributes );
			}

			$variation->save();

			do_action( 'woocommerce_rest_save_product_variation', $variation->get_id(), $menu_order, $data );
		}

		return true;
	}