Is a child a geograft?

When looping thru the children of a node, is there something I can check to see if that child is geografted to the node?

var gNumChildren = oNode.getNumNodeChildren();
		
for( var c = 0; c < gNumChildren; c++ ){
    var gChild = oNode.getNodeChild( c );
    //Check to see if this child is geografted to oNode?????
}