src/vs/workbench/services/extensionManagement/browser/extensionEnablementService.ts/ExtensionEnablementService/_onDidChangeExtensions
class ExtensionEnablementService:	private _onDidChangeExtensions(added: ReadonlyArray<IExtension>, removed: ReadonlyArray<IExtension>): void {
		const disabledExtensions = added.filter(e => !this.isEnabledEnablementState(this.getEnablementState(e)));
		if (disabledExtensions.length) {
			this._onEnablementChanged.fire(disabledExtensions);
		}
		removed.forEach(({ identifier }) => this._reset(identifier));
	}