| # getBackingMemory method | |
| *[<Null safety>](https://dart.dev/null-safety)* | |
| - @override | |
| [Vmo](../../zircon/Vmo-class.md) getBackingMemory | |
| (dynamic flags) | |
| _<span class="feature override">override</span>_ | |
| ## Implementation | |
| ```dart | |
| @override | |
| Vmo getBackingMemory(VmoFlags flags) { | |
| if (_sharingMode == VmoSharingMode.shareDuplicate) { | |
| return _vmo.duplicate(ZX.RIGHTS_BASIC | | |
| ZX.RIGHT_READ | | |
| ZX.RIGHT_MAP | | |
| ZX.RIGHT_GET_PROPERTY); | |
| } | |
| throw fidl.MethodException(ZX.ERR_NOT_SUPPORTED); | |
| } | |
| ``` | |