/**
* Note that if the item is considered equal to an already existing item
* in the set that it will be replaced.
*
* @param $item
*
* @return void
*/
function add($item)
{
$this->bst->add($item);
}
/**
* Note that if the key is considered equal to an already existing key in
* the map that it's value will be replaced with the new one.
*
* @param $key
* @param mixed $value
*
* @return void
*/
function set($key, $value)
{
$this->avl->add(new Pair($key, $value));
}
