a GoObject that is an immediate child of this group
Return Value
a String, perhaps an empty one if no name is known
Remarks
A child object will not have a name unless you call AddChildName first, or unless this method is overridden to provide a name. This is frequently overridden when defining a group or node that has well-known parts. Often such parts are also accessible as a property on the class, and the name of the part will be the same as the name of the property. If you override this, you will probably also need to override FindChild.