Checks that result is a #GTask, and that source_object is its source object (or that source_object is null and result has no source object). This can be used in g_return_if_fail() checks.
A #GAsyncResult
the source object expected to be associated with the task
true if result and source_object are valid, false if not
Checks that result is a #GTask, and that source_object is its source object (or that source_object is null and result has no source object). This can be used in g_return_if_fail() checks.