code: public function getParserForContentType($contentType)
      {
          if(0 !== stripos($contentType, 'multipart/')) {
              return null;
          }
  
          list($mime, $boundary) = $this->parseContentType($contentType);
  
          $parser = new MultipartParser();
          $parser->setBoundary($boundary);
  
          return $parser;
      }
docs: Give me your Content-Type, and i give you a parser.
  
  @param $contentType
  @return MultipartParser|null