protected function set_product_data( &$product, $data ) {
		if ( isset( $data['raw_attributes'] ) ) {
			$attributes          = array();
			$default_attributes  = array();
			$existing_attributes = $product->get_attributes();

			foreach ( $data['raw_attributes'] as $position => $attribute ) {
				$attribute_id = 0;

				// Get ID if is a global attribute.
				if ( ! empty( $attribute['taxonomy'] ) ) {
					$attribute_id = $this->get_attribute_taxonomy_id( $attribute['name'] );
				}

				// Set attribute visibility.
				if ( isset( $attribute['visible'] ) ) {
					$is_visible = $attribute['visible'];
				} else {
					$is_visible = 1;
				}

				// Get name.
				$attribute_name = $attribute_id ? wc_attribute_taxonomy_name_by_id( $attribute_id ) : $attribute['name'];

				// Set if is a variation attribute based on existing attributes if possible so updates via CSV do not change this.
				$is_variation = 0;

				if ( $existing_attributes ) {
					foreach ( $existing_attributes as $existing_attribute ) {
						if ( $existing_attribute->get_name() === $attribute_name ) {
							$is_variation = $existing_attribute->get_variation();
							break;
						}
					}
				}

				if ( $attribute_id ) {
					if ( isset( $attribute['value'] ) ) {
						$options = array_map( 'wc_sanitize_term_text_based', $attribute['value'] );
						$options = array_filter( $options, 'strlen' );
					} else {
						$options = array();
					}

					// Check for default attributes and set "is_variation".
					if ( ! empty( $attribute['default'] ) && in_array( $attribute['default'], $options, true ) ) {
						$default_term = get_term_by( 'name', $attribute['default'], $attribute_name );

						if ( $default_term && ! is_wp_error( $default_term ) ) {
							$default = $default_term->slug;
						} else {
							$default = sanitize_title( $attribute['default'] );
						}

						$default_attributes[ $attribute_name ] = $default;
						$is_variation                          = 1;
					}

					if ( ! empty( $options ) ) {
						$attribute_object = new WC_Product_Attribute();
						$attribute_object->set_id( $attribute_id );
						$attribute_object->set_name( $attribute_name );
						$attribute_object->set_options( $options );
						$attribute_object->set_position( $position );
						$attribute_object->set_visible( $is_visible );
						$attribute_object->set_variation( $is_variation );
						$attributes[] = $attribute_object;
					}
				} elseif ( isset( $attribute['value'] ) ) {
					// Check for default attributes and set "is_variation".
					if ( ! empty( $attribute['default'] ) && in_array( $attribute['default'], $attribute['value'], true ) ) {
						$default_attributes[ sanitize_title( $attribute['name'] ) ] = $attribute['default'];
						$is_variation = 1;
					}

					$attribute_object = new WC_Product_Attribute();
					$attribute_object->set_name( $attribute['name'] );
					$attribute_object->set_options( $attribute['value'] );
					$attribute_object->set_position( $position );
					$attribute_object->set_visible( $is_visible );
					$attribute_object->set_variation( $is_variation );
					$attributes[] = $attribute_object;
				}
			}

			$product->set_attributes( $attributes );

			// Set variable default attributes.
			if ( $product->is_type( 'variable' ) ) {
				$product->set_default_attributes( $default_attributes );
			}
		}
	}