/**
 * Recursively merge 2 Objects together.  Will resolve functions if they are present, unless the parent Object has the property `_toExpand = false`.
 * Actionhero uses this internally to construct and resolve the config.
 * Matching keys in B override A.
 */
export declare function hashMerge(a: Record<string, any>, b: Record<string, any>, arg?: Record<string, any>): {
    [key: string]: any;
};