psalm/docs/running_psalm/issues/PossiblyFalseReference.md

PossiblyFalseReference

Emitted when making a method call on a value than might be false

<?php

class A {
    public function bar() : void {}
}

/** @return A|false */
function foo() {
    return rand(0, 1) ? new A : false;
}

foo()->bar();