Options to configure the behaviour of a file save dialog.
Fields
optionaltitle:Null<String>
Dialog title.
This parameter might be ignored, as not all operating systems display a title on save dialogs (for example, macOS).
optionalfilters:Null<DynamicAccess<Array<String>>>
A set of file filters that are used by the dialog. Each entry is a human-readable label, like "TypeScript", and an array of extensions, e.g.
{
'Images': ['png', 'jpg']
'TypeScript': ['ts', 'tsx']
}