Add the possiblity to spy a property, not a whole object

[ismail1432]

<?php
$spyBase = new SpyBase();

$spyProperty = new SpyProperty('id', $propertyName, $propertyValue);
$spyBase->addSpyiedProperty('id', $propertyName, $propertyValue);

$spiedProperty =$spy->getSpiedProperty()

$spiedPropery->IsPropertyModified($propertyCurrentValue);

Maybe add a comparaison strategy such as strict comparaison and/or callback

$spiedPropery->IsPropertyModified($propertyCurrentValue, $strictComparaison = true, $comparaisonCallable = null);