Description:
------------
Since list is a language construct, it would be great if it had type hinting.

list(ContractPrice $price, Adjustment $adj) = $deps;

truth be told I got this whim from PHPUnit, where I like having type hinting on 
my @dependent tests -- example is based on that.


Test script:
---------------
/**
 * @depends testReturns_ContractPrice
 */
function testReturnsArray(ContractPrice $price) {
    $adjustment = new Adjustment;
    $this->assertEquals('stuff', $price->stuff($adjustment));

    return array($price, $adjustment);
}


/**
 *@depends testReturns_Array
 */
function testTypeHintingLists(array $deps) {
    list(ContractPrice $price, Adjustment $adjustment) = $deps;
}