docs: public static <T> int indexOf(T[] array, Object value) {
  		if (null != array) {
  			for (int i = 0; i < array.length; i++) {
  				if (ObjectUtil.equal(value, array[i])) {
  					return i;
  				}
  			}
  		}
  		return INDEX_NOT_FOUND;
  	}