| ⇢ | A | RequestFactory added | 
| ⇢ | C | RequestFactory::create() added | |
| ⇢ | B | RequestFactory::createUri() added | |
| ⇢ | B | RequestFactory::getHeaders() added | |
| ⇢ | A | RequestFactory::populateUploadedFileRecursive() added | |
| ⇢ | A | RequestFactory::__construct() added | |
| ⇢ | A | RequestFactory::normalizeHeaderName() added |