php - PhpStorm validation Error for custom static method

public static function someStaticMethod($method, ...$args)
{
    ...
    return self::{"_$method"}(...$args);
}

So despite code is valid for PHP 7, and in Languages & Frameworks | PHP settings Language Level is set to 7.1, I'm getting error hint for the return line.

Can it be somehow disabled for this line or for this case, or maybe I'm really messing something badly?

PhpStorm version: 2016.2.2

Error hint that shows on the first curly brace:

Expected: namespace or use or goto or if or elseif or else or for or
foreach keyword or while or do or switch or case or default keyword or
try or catch or declare or break or endif or endfor or endforeach or

endwhile or endswitch or enddeclare or die or exit or private or
function or new or instanceof or const or list or implements or eval
or final or as or throw or include_once or class or abstract or
interface keyword or public keyword or static keyword or clone keyword
or isset keyword or empty keyword or return or var or continue or
protected or print or echo or include or global or extends or unset or
require_once or array or callable or require or identifier or and
keyword or or keyword or xor keyword or trait or insteadof or finally
or yield

Answer

This is fixed (WI-13620 ticket) for next major version -- PhpStorm 2017.1 (I see no warning in the code below).

If you wish -- you may try 2017.1 EAP build now (different IDE versions can be run in parallel as they store IDE-wide settings in separate locations by default).

Please note: it's an EAP build (Early Access Program) so it may have other issues (incompatible plugins, slow execution, other new bugs caused by newly-introduced feature etc.).