A pointer to a %NULL-terminated array of pointers to #GDBusAnnotationInfo structures or %NULL if there are no annotations.
A pointer to a %NULL-terminated array of pointers to #GDBusArgInfo structures or %NULL if there are no arguments.
The name of the D-Bus signal, e.g. "NameOwnerChanged".
The reference count or -1 if statically allocated.
If info is statically allocated does nothing. Otherwise increases
the reference count.
If info is statically allocated, does nothing. Otherwise decreases
the reference count of info. When its reference count drops to 0,
the memory used is freed.
Information about a signal on a D-Bus interface.