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# extension-lifecycle
## Enable/Disable Symmetry
`enable()` and `disable()` must be adjacent in `extension.js`.
## Construction Order
Create settings first, then managers, then UI widgets.
## Destruction Order
Destroy in reverse order of creation: UI first, then managers, then settings.
## Cleanup Completeness
Every object assigned to `this` in `enable()` must be set to null in `disable()`.
## GObject Dispose
Never call `run_dispose()` unless absolutely necessary. `destroy()` is sufficient for St widgets.
## Async Resources
Async initializers must have matching destroy that cancels pending operations.
