| 
                                 15% 
             | 
    ↗ | 
                                 100% 
             | 
    FileSender improved | 
| 
                                 2 
             | 
    ↘ | 
                                 1 
             | 
    FileSender::requestAsync() improved | 
| 
                                 2 
             | 
    ↘ | 
                                 1 
             | 
    FileSender::request() improved | 
| 
                                 20 
             | 
    ↘ | 
                                 4 
             | 
    FileSender::checkFileUploadRequest() improved |