public function guard($value, Field $field)
    {
        /** @var Microtime $value */
        Assertion::isInstanceOf($value, Microtime::class, null, $field->getName());
    }
public function guard($value, Field $field)
    {
        /** @var Microtime $value */
        Assertion::isInstanceOf($value, Microtime::class, null, $field->getName());
    }
{@inheritdoc}