public function get_product_attribute_terms( $attribute_id, $fields = null ) {
		try {
			// Permissions check.
			if ( ! current_user_can( 'manage_product_terms' ) ) {
				throw new WC_API_Exception( 'woocommerce_api_user_cannot_read_product_attribute_terms', __( 'You do not have permission to read product attribute terms', 'woocommerce' ), 401 );
			}

			$attribute_id = absint( $attribute_id );
			$taxonomy = wc_attribute_taxonomy_name_by_id( $attribute_id );

			if ( ! $taxonomy ) {
				throw new WC_API_Exception( 'woocommerce_api_invalid_product_attribute_id', __( 'A product attribute with the provided ID could not be found', 'woocommerce' ), 404 );
			}

			$terms = get_terms( $taxonomy, array( 'hide_empty' => false ) );
			$attribute_terms = array();

			foreach ( $terms as $term ) {
				$attribute_terms[] = array(
					'id'    => $term->term_id,
					'slug'  => $term->slug,
					'name'  => $term->name,
					'count' => $term->count,
				);
			}

			return array( 'product_attribute_terms' => apply_filters( 'woocommerce_api_product_attribute_terms_response', $attribute_terms, $terms, $fields, $this ) );
		} catch ( WC_API_Exception $e ) {
			return new WP_Error( $e->getErrorCode(), $e->getMessage(), array( 'status' => $e->getCode() ) );
		}
	}