Wire SetUp

public void SetUp(bool fromScratch, Soup sp)
{
    if (fromScratch) {
        LseElectricElement wire = SchemeMgr().GetElectricElement("");
        LseElectricBuilder builder = wire.Builder();
        LseElectricNode mid = builder.CreateNode("mid");
        plusHalf = builder.MakeElement("plushalf", builder.GetStartNode(wire), mid);
        minusHalf = builder.MakeElement("minushalf", mid, builder.GetEndNode(wire));
    }
    // else elements will be initialized in SetProperties
}