A PortClass defines implementation details of the port instances of a ProtocolClass
([Online documentation](https://eclipse.dev/etrice/docs/reference/room-language#portclass))

```room
// This example uses the port class interface provided by the c code generator
ProtocolClass PingPong {
	incoming {
		Message ping(uint8)
	}
	outgoing {
		Message pong(uint8)
	}
	regular PortClass {
		//...
	}
	conjugated PortClass {
		// ...
	}
}
```