In the current version 7400.2.5.255 of the NWBC offers the SAP GUI Scripting API a new property in the GUIConnectionClass, called ChildrenForNWBC.
It is not documented yet. It delivers an IDispatch of GUIComponentenCollection, like Children property.
The difference between ChildrenForNWBC and Children is at the moment not clear, because ChildrenForNWBC delivers also a result if NWBC doesn’t run. This means it delivers the same result when it is called only with SAP GUI for Windows and the result is also the same as Children property.
Here a picture of the methods and properties of ChildrenForNWBC.