Scala Method

  def getAllDocumentsFromGoogleDocs(code: String) = {
    val service = prepareGoogleDrive(code)
    val result = scala.collection.mutable.ListBuffer.empty[File]
    val request = service.files.list

    do {
      val files = request.execute
      val retrievedFiles = files.getItems
      retrievedFiles.forEach( file => result ++= List[File](file))
      request.setPageToken(files.getNextPageToken)
    } while (request.getPageToken() != null && request.getPageToken().length() > 0)

        result.toList map {
      case a => (a.getOriginalFilename, a.getAlternateLink)
    }
  }


[error] /.../app/models/DriveClient.scala:93: missing parameter type
[error]       retrievedFiles.forEach( file => result ++= List[File](file))
[error]                                ^