[TomasVotruba]

Follow-up to #1102.

findAndRemoveMethodExpr() called getArgs()[0] on matching method calls without checking for first-class callables. A configure() like this crashed the rule:

protected function configure(): void
{
    $setDescription = $this->setDescription(...);
    $setDescription('Some description');
}

TypeError: isPermittedAttributeValue(): Argument #1 ($expr) must be of type PhpParser\Node\Expr, null given

Now the first-class callable is skipped, same as in hasPermittedMethodCall(). Covered by skip_first_class_callable fixture.