isValid
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.
Return
true if @result and @source_object are valid, false if not
Since
2.36
Parameters
result
A #GAsyncResult
sourceObject
the source object expected to be associated with the task