/**
 * Gets union Array of two given Arrays
 * @param arr1{Array} - first source Array
 * @param arr2{Array} - sound source Array
 * @return {Array}
 * @example
 * // How to merge two arrays in JavaScript and de-duplicate items?
 * const arr1 = [ 1, 2, 3 ];
 * const arr2 = [ 2, 3, 4, 5 ];
 * const union = getUnion(arr1, arr2);
 * console.log(union); // => [ 1, 2, 3, 4, 5 ];
 */
export function getUnion(arr1: any[], arr2: any[]): any[];
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