a #GType supporting #GAsyncInitable.
the number of parameters in @parameters
the parameters to use to construct the object
the [I/O priority][io-priority] of the operation
optional #GCancellable object, %NULL to ignore.
a #GAsyncReadyCallback to call when the initialization is finished
the data to pass to callback function
2.22
Helper function for constructing #GAsyncInitable object. This is similar to g_object_newv() but also initializes the object asynchronously.
When the initialization is finished, @callback will be called. You can then call g_async_initable_new_finish() to get the new object and check for any errors.