How do I add another to the Workspace menu ?

How do I add an option at this location ?
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@Dennis thank you for the discussion, this is actually a toolbar item, where multiple items are put under the same group and result in a context menu.

You can register your own toolbar item to this group like so:

@vince-fugnitto Thanks for your reply,But I have tried many ways, but there is still no solution. Could you please help me have a look again.

@Dennis Are these methods actually called? Have you bound them correctly?

In your case, your binding should look like this:

bind(NewFileContribution).toSelf().inSingletonScope();
bind(CommandContribution).toService(NewFileContribution);
bind(MenuContribution).toService(NewFileContribution);
bind(TabBarToolbarContribution).toService(NewFileContribution);