gossi\codegen\generator\utils\Writer::rtrim PHP Method

    public function rtrim()
    {
        $addNl = "\n" === substr($this->content, -1);
        $this->content = rtrim($this->content);
        if ($addNl) {
            $this->content .= "\n";
        }
        return $this;
    }

 /**
  * @return void
  */
 protected function ensureBlankLine()
 {
     if (!$this->writer->endsWith("\n\n") && strlen($this->writer->rtrim()->getContent()) > 0) {
         $this->writer->writeln();
     }
 }