[RFC] Support for asymetric property visibility

[Nek-]

I figure out that this code does not work:

class AsymetricPropertyVisibility
{
    public private(set) string $foo;
}

$prophet = new Prophet();
$object = $prophet->prophesize(AsymetricPropertyVisibility::class);

$object->foo = 'yo';

$double = $object->reveal();

var_dump($double->foo);

It fails with this error:

Error: Cannot modify private(set) property Fixtures\Prophecy\AsymetricPropertyVisibility::$foo from scope Prophecy\Prophecy\ObjectProphecy

It's logical but not convenient. I think it would be possible to support it after #623 is merged, WDYT?

[stof]

Why would you expect to be able to set a foo property externally if it is private(set) ?