Qa\SoftMocks::isCallable PHP Method

    public static function isCallable($callable)
    {
        if (empty($callable)) {
            return false;
        }
        if (is_array($callable) && sizeof($callable) === 2) {
            if (is_object($callable[0])) {
                $class = get_class($callable[0]);
            } else {
                $class = $callable[0];
            }
            if (isset(self::$mocks[$class][$callable[1]])) {
                return true;
            }
            return is_callable($callable);
        }
        if (is_scalar($callable) && isset(self::$func_mocks[$callable])) {
            return true;
        }
        return is_callable($callable);
    }