Callable should only allow public methods if used as arg in a non-$this/self context about psalm HOT 1 CLOSED

<?php

/**
 * @param callable $arg
 * @return void
 */
function foo($arg) {
    call_user_func($arg);
}

class A {
    public function __construct() {
		foo(array($this, 'run')); // this should be an error, since it's a fatal
        $this->bar(array($this, 'run')); // this is fine
    }
    
    private function run() : void {
        echo "done";
    }

    /**
     * @param callable $arg
     * @return void
     */
    protected function bar($arg) {
        call_user_func($arg);
    }
}

$a = new A();