## Description

Instanciation of net. Differents kind of nets are listed below :

- `SignalIn` : Creation of an input port
- `SignalOut` : Creation of an output port
- `SignalInOut` : Creation of an inout port
- `SignalUnknown` : Creation of an input/output port which direction is not defined
- `TriState` : Creation of a tristate port
- `CkIn` : Creation of a clock port
- `VddIn` : Creation of the vdd alimentation
- `VssIn` : Creation of the vss alimentation
- `Signal` : Creation of an internal net