/**
    Remove duplicate values from a list with an optional iterator string or function. By default return the transformed value if iteratee exists.
    @param {Array<any>} list An array of values or objects.
    @param {string|Function} [accessor] An optional accessor function that takes an object and returns the value to judge uniqueness by. If accessor is a string instead of a function, judges uniqueness by the property named by accessor on each of the objects.
    @param {boolean} [transform=true] If true, return the transformed value from accessor.
    @returns {Array<any>|null} An array of unique values or null if the input is not an array.
*/
export default function uniques(list: Array<any>, accessor?: string | Function, transform?: boolean): Array<any> | null;