protected function getTo()
    {
        $to = is_array($this->to) ? null : $this->to;

        if ($this->topic && $this->topic->hasOnlyOneTopic()) {
            $to = $this->topic->build();
        }

        return $to;
    }
protected function getTo()
    {
        $to = is_array($this->to) ? null : $this->to;

        if ($this->topic && $this->topic->hasOnlyOneTopic()) {
            $to = $this->topic->build();
        }

        return $to;
    }
protected function getTo ( ) { $ to = is_array ( $ this -> to ) ? null : $ this -> to ; if ( $ this -> topic && $ this -> topic -> hasOnlyOneTopic ( ) ) { $ to = $ this -> topic -> build ( ) ; } return $ to ; }
get to key transformed.

@return array|null|string
get to key transformed .