/**
 * Gets an item from an array based on a mapped index.
 * @param index The index of the item to get.
 * @param array The array to get the item from.
 * @param indexMapFn A function that maps the index to a new index.
 * @returns The item at the mapped index in the array.
 * @example
 * const array = ['a', 'b', 'c', 'd', 'e']
 * const indexMapFn = (index, length) => (index * 2) % length
 * getItem(2, array, indexMapFn)
 * // Returns 'e'
 */
export declare const getItem: <T>(index: number, array: T[], indexMapFn: (index: number, length: number) => number) => T;