abstract fun showOpenDialog(browserWindow: BrowserWindow, options: OpenDialogOptions, callback: ((filePaths: Array<String>, bookmarks: Array<String>) -> Unit)? = definedExternally): Array<String>abstract fun showOpenDialog(options: OpenDialogOptions, callback: ((filePaths: Array<String>, bookmarks: Array<String>) -> Unit)? = definedExternally): Array<String>