--TEST--
Integration of fixers: use_arrow_functions,function_declaration.
--RULESET--
{"use_arrow_functions": true, "function_declaration": {"closure_fn_spacing": "none"}}
--EXPECT--
<?php

$fn = static fn(string $class): bool => is_subclass_of($class, Exception::class);

--INPUT--
<?php

$fn = static function (string $class): bool {
    return is_subclass_of($class, Exception::class);
};