<?php declare(strict_types = 1);

class Foo
{
	public function bar(): int
	{
		return 5;
	}
}

/**
 * @mixin Foo
 */
class Bar
{
	/**
     * @param  mixed[]  $args
     * @return mixed
     */
	public static function __callStatic(string $method, $args)
    {
        $instance = new Foo;

        return $instance->$method(...$args);
    }
}

Bar::bar();