Emitted when --find-dead-code is turned on and Psalm cannot find any uses of a
particular public/protected property.
If this property is used and part of the public API, annotate the containing
class with @psalm-api.
<?php
class A {
/** @var string|null */
public $foo;
/** @var int|null */
public $bar;
}
$a = new A();
echo $a->foo;