/** What `createDocument` writes and where it offers to put it — the Rust
 *  `CreateDocumentArgs`, camelCase. */
@InvokeArg
class CreateDocumentArgs {
    /** the name the sheet opens with, its extension included */
    var name: String? = null
    /** the type Android files it under, and picks the sheet's apps by */
    var mime: String? = null
    /** the whole file, built in Rust — the WebView never sees it */
    var text: String? = null
}