Enable or disable the sound card entirely by adding or removing the sound device. Bluetooth headset not be affected.
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1. Please add this to the `Indicator` class: ```js destroy() { if (sourceId) { GLib.Source.remove(sourceId); sourceId = null; } super.destroy(); } ``` and remove line 143-146 `extension.js`. Also, You can make `sourceId` a property of `Indicator` class instead of using a global variable. 2. Please remove line 150-156 `extension.js`. 3. `lookupByUUID()` is a bad practice (line 54 and 61 `extension.js`). You can send `this` from the entry point to the `Indicator` class (dependency injection). Wanna fix and send it again?