private function get_variation_data( $product ) {
		$prices_precision = wc_get_price_decimals();
		$variations       = array();

		foreach ( $product->get_children() as $child_id ) {

			$variation = wc_get_product( $child_id );

			if ( ! $variation || ! $variation->exists() ) {
				continue;
			}

			$variations[] = array(
				'id'                => $variation->get_id(),
				'created_at'        => $this->server->format_datetime( $variation->get_date_created(), false, true ),
				'updated_at'        => $this->server->format_datetime( $variation->get_date_modified(), false, true ),
				'downloadable'      => $variation->is_downloadable(),
				'virtual'           => $variation->is_virtual(),
				'permalink'         => $variation->get_permalink(),
				'sku'               => $variation->get_sku(),
				'price'             => wc_format_decimal( $variation->get_price(), $prices_precision ),
				'regular_price'     => wc_format_decimal( $variation->get_regular_price(), $prices_precision ),
				'sale_price'        => $variation->get_sale_price() ? wc_format_decimal( $variation->get_sale_price(), $prices_precision ) : null,
				'taxable'           => $variation->is_taxable(),
				'tax_status'        => $variation->get_tax_status(),
				'tax_class'         => $variation->get_tax_class(),
				'managing_stock'    => $variation->managing_stock(),
				'stock_quantity'    => (int) $variation->get_stock_quantity(),
				'in_stock'          => $variation->is_in_stock(),
				'backordered'       => $variation->is_on_backorder(),
				'purchaseable'      => $variation->is_purchasable(),
				'visible'           => $variation->variation_is_visible(),
				'on_sale'           => $variation->is_on_sale(),
				'weight'            => $variation->get_weight() ? wc_format_decimal( $variation->get_weight(), 2 ) : null,
				'dimensions'        => array(
					'length' => $variation->get_length(),
					'width'  => $variation->get_width(),
					'height' => $variation->get_height(),
					'unit'   => get_option( 'woocommerce_dimension_unit' ),
				),
				'shipping_class'    => $variation->get_shipping_class(),
				'shipping_class_id' => ( 0 !== $variation->get_shipping_class_id() ) ? $variation->get_shipping_class_id() : null,
				'image'             => $this->get_images( $variation ),
				'attributes'        => $this->get_attributes( $variation ),
				'downloads'         => $this->get_downloads( $variation ),
				'download_limit'    => (int) $product->get_download_limit(),
				'download_expiry'   => (int) $product->get_download_expiry(),
			);
		}

		return $variations;
	}