Dan
@nguyenhongphat0 Hi, I create a sample here [opensumi-module-samples#7](https://github.com/opensumi/opensumi-module-samples/pull/7) , you can see the `Toggle Panel or Sidebar` demo know-how to use it.
And the Electron client can not get `IMainLayoutService` service instance directly, maybe you should use a custom `EventService` to make it work.
now the monaco editor core is 0.35.x.
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Iteration Plan #1777
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