As of version  "@types/kendo-ui": "2020.3.0":

FileManager methods: path, view, getSelected, getSize have return type void, which is a pain to handle since it can't even be cast to bool.

FileManager method navigate doesn't accept params, should accept string 'path'.

FileManager method executeCommand doesn't accept params, should accept as per https://docs.telerik.com/kendo-ui/api/javascript/ui/filemanager/methods/executecommand .

FileManagerContextMenu interface is missing all event handlers: close, open, activate, deactivate, select.

The following are not exposed:
- kendo.data.schemas
- kendo.ui.filemanager.commands