GFileEnumerator object that will give out GFileInfo objects for
all the files in the directory.gFileEnumerateChildrenAsync(object, attributes, flags = "G_FILE_QUERY_INFO_NONE", io.priority = 0, cancellable = NULL, callback, user.data = NULL)gFileEnumerateChildren which is
the synchronous version of this call.
When the operation is finished, callback will be called. You can then call
gFileEnumerateChildrenFinish to get the result of the operation.