/**
 * Combine multiple arrays into a single with unique items based on filter
 * @param arrays Arrays to be combined
 * @param filter The filter function to be applied to arrays, default `Type.is`, `(obj1, obj2)=>boolean`
 * @returns {Array<T>} The combined array
 */
export declare function combineUniqueFilter<T>(...arrays: Array<Array<T> | T>): Array<T>;