<?php
/**
 * @param callable(
 * int
 * ): string $callable
 */
function takesAnInt(callable $callable) : void {
}

https://phpstan.org/r/e521d1f0-70b7-4cc3-bae6-0e228ad58cc6

This gives parsing error

PHPDoc tag @param has invalid value (callable( int): Unexpected token "(", expected variable at offset 22