protected function namespaceHandler(Throwable $exception) : ?Throwable
    {
        if ($this->namespace && $exception instanceof ClientException) {
            return $exception->withNamespace($this->namespace);
        }

        return null;
    }
protected function namespaceHandler(Throwable $exception) : ?Throwable
    {
        if ($this->namespace && $exception instanceof ClientException) {
            return $exception->withNamespace($this->namespace);
        }

        return null;
    }
protected function namespaceHandler ( Throwable $ exception ) : ? Throwable { if ( $ this -> namespace && $ exception instanceof ClientException ) { return $ exception -> withNamespace ( $ this -> namespace ) ; } return null ; }
Handle namespace change.

@param \Throwable $exception

@return \Throwable|null
Handle namespace change .