I want to hide bread crumbs when I open the custom editor. Therefore, I returned undefined when implementing the Navigatable interface, which can be hidden, but an error will be reported when saving the editor. How can I solve it
@helloworld thank you for the discussion, I believe there was a bug in previous versions where saving would not work but it has been fixed, can you try upgrading to 1.25.0? (for example, workspace-save-resource-service.ts no longer exists and was fixed by https://github.com/eclipse-theia/theia/pull/10868).
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Thank you. I’ll try to upgrade later 
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