How to use the @theia/workspace/lib/browser/workspace-commands.WorkspaceCommands.FILE_COMPARE function in @theia/workspace

registry.registerMenuAction(NavigatorContextMenu.MOVE, {
            commandId: WorkspaceCommands.FILE_RENAME.id
        });
        registry.registerMenuAction(NavigatorContextMenu.MOVE, {
            commandId: WorkspaceCommands.FILE_DELETE.id
        });

        registry.registerMenuAction(NavigatorContextMenu.NEW, {
            commandId: WorkspaceCommands.NEW_FILE.id
        });
        registry.registerMenuAction(NavigatorContextMenu.NEW, {
            commandId: WorkspaceCommands.NEW_FOLDER.id
        });
        registry.registerMenuAction(NavigatorContextMenu.DIFF, {
            commandId: WorkspaceCommands.FILE_COMPARE.id
        });
    }
}