+ Signal that is sent when a new technology is added.
+
+ It contains the object path of the technology and
+ also its properties.
+
+ TechnologyRemoved(object path)
+
+ Signal that is sent when a modem has been removed.
+
+ The object path is no longer accessible after this
+ signal and only emitted for reference.
+
+ ServicesAdded(array{object, dict})
+
+ List of service that have been added. The array
+ is a list of services that is sorted with existing
+ services containing an empty dictionary and new
+ services containing the properties.
+
+ This signal will only inform about added services
+ and in case that services get added and removed at
+ the same time, a ServicesRemoved signal will be
+ sent first.
+
+ ServicesRemoved(array{object})
+
+ Signals a list of services that are no longer valid.