public InfraNestedSimplePropLvl3(
     InfraNestedSimplePropLvl4 l4,
     int lvl3)
 {
     this.L4   = l4;
     this.Lvl3 = lvl3;
 }
 public InfraNestedSimplePropLvl3(InfraNestedSimplePropLvl4 l4, int lvl3)
 {
     L4   = l4;
     Lvl3 = lvl3;
 }