The unique bus name for the destination for the signal or NULL to emit to all listeners. [allow-none]
Path of remote object.
D-Bus interface to emit a signal on.
The name of the signal to emit.
A GVariant tuple with parameters for the signal or NULL if not passing parameters. [allow-none]
TRUE unless error is set.
GException on failure.
Emits a signal. If the parameters GVariant is floating, it is consumed. This can only fail if parameters is not compatible with the D-Bus protocol. Since 2.26