/**
 * @PropertyAccessor(getter="getCurrentValue", setter="updateValue")
 */
protected $value;

/**
 * @PropertyAccessor(adder="joinMember", remover="detachMember")
 */
protected $members;

public function getCurrentValue()
{
    return $this->value;
}

public function updateValue($newValue)
{
    $this->value = $newValue;
    return $this;
}

public function joinMember($newMember)
{
    // Add $newMember to the collection
}

public function detachMember($oldMember)
{
    // Remove $oldMember from the collection
}

// Notice that "calculated" is not a real property!
/**
 * @GetterAccessor(property="calculated")
 */
public function getCalculated()
{
    // whatever...
}

// You can omit 'property' in method annotations
/**
 * @SetterAccessor("calculated")
 */
public function setCalculated($calculated)
{
    // whatever...
}