UnusedProperty

Emitted when --find-dead-code is turned on and Psalm cannot find any uses of a private property.

Properties used in constructor only are considered unused. Use normal variables instead.

If this property is used and part of the public API, annotate the containing class with [@psalm-api](https://github.com/psalm-api).

<?php

class A {
    /** [@var](https://github.com/var) string|null */
    private $foo;

    /** [@var](https://github.com/var) int|null */
    private $bar;

    public function getFoo(): ?string {
        return $this->foo;
    }
}

$a = new A();
echo $a->getFoo();