The signal accumulator was invoked for the first time.
This flag is only used in GObject.SignalAccumulator[accumulator functions]
for the run_type field of the GObject.SignalInvocationHint, to
mark the first call to the accumulator function for a signal emission.
Action signals are signals that may freely be emitted on alive objects from user code via GObject.signal_emit and friends, without the need of being embedded into extra code that performs pre or post emission adjustments on the object. They can also be thought of as object methods which can be called generically by third-party code.
The signal is deprecated and will be removed in a future version.
A warning will be generated if it is connected while running with
G_ENABLE_DIAGNOSTIC=1.
This signal supports ::detail appendices to the signal name
upon handler connections and emissions.
Varargs signal emission will always collect the arguments, even if there are no signal handlers connected.
No emissions hooks are supported for this signal.
Signals being emitted for an object while currently being in emission for this very object will not be emitted recursively, but instead cause the first emission to be restarted.
Invoke the default signal handler in the last emission stage
Invoke the default signal handler in the first emission stage
Invoke the default signal handler in the third emission stage
The signal flags are used to specify a signal's behaviour.