addNewChild
fun <ChildT : ITypedNode, ChildConceptT : INonAbstractConcept<ChildT>> INode.addNewChild(link: ITypedChildLink<ChildT>, index: Int = -1, subConcept: ChildConceptT? = null): ChildT
inline fun <NodeT : ITypedNode> INode.addNewChild(role: String, concept: INonAbstractConcept<NodeT>): NodeT