MoveDown = function (array, item)
{
    var currentIndex = array.indexOf(item);

    if (currentIndex > 0)
    {
        var item2 = array[currentIndex - 1];

        var index2 = array.indexOf(item2);

        array[currentIndex] = item2;
        array[index2] = item;
    }

    return array;
}
Moves the given array element down one place in the array.
The array is modified in-place.

@function Phaser.Utils.Array.MoveDown
@since 3.4.0

@param {array} array - The input array.
@param {*} item - The element to move down the array.

@return {array} The input array.