public static function invoke(Foo $instance)
{
// Same class, other instance, direct call.
$instance->call();
// Same class, other instance, indirect call.
$foo = new Foo();
$foo->call();
// Same class, other instance, indirect call.
$x = new Foo();
$y = $x;
$z = $y;
$z->call();
// Same class, other instance, direct call.
(new Foo())->call();
// Other class, other instance, indirect call.
$bar = new Bar();
$bar->call();
// Other class, other instance, direct call.
(new Bar())->call();
}
