ContentProvider.writeMimeTypeAsync

void writeMimeTypeAsync(string mimeType,  gio.output_stream.OutputStream stream,  int  ioPriority,  gio.cancellable.Cancellable cancellable =  null,  gio.types.AsyncReadyCallback callback =  null)

Asynchronously writes the contents of provider to stream in the given mime_type.

When the operation is finished callback will be called. You must then call [gdk.content_provider.ContentProvider.writeMimeTypeFinish] to get the result of the operation.

The given mime type does not need to be listed in the formats returned by [gdk.content_provider.ContentProvider.refFormats]. However, if the given GType is not supported, [gio.types.IOErrorEnum.NotSupported] will be reported.

The given stream will not be closed.

Parameters

`mimeType`	the mime type to provide the data in
`stream`	the [gio.output_stream.OutputStream] to write to
`ioPriority`	I/O priority of the request.
`cancellable`	optional [gio.cancellable.Cancellable] object, null to ignore.
`callback`	callback to call when the request is satisfied