/**
 * @internal Resolves a recipe's appearance prop against the `data-<axis>` a
 * consumer may have written on the recipe tag instead, so both reach the part
 * the recipe feeds. The prop wins whenever it is set.
 */
export declare function recipeAxis<T>(prop: T | undefined, attrs: object, attribute: string): T | undefined;
/**
 * @internal {@link recipeAxis} for a presence axis, where the written attribute
 * carries no value: anything but an explicit `false` reads as on.
 */
export declare function recipeFlag(prop: boolean | undefined, attrs: object, attribute: string): boolean | undefined;