function neighbors ( a: KaryGraph.API.AbstractionLayer.DotObjectOrDotID,
                         b: KaryGraph.API.AbstractionLayer.DotObjectOrDotID ): boolean {
        let d1 = KaryGraph.API.AbstractionLayer.GetDotByDotOrId( a );
        let d2 = KaryGraph.API.AbstractionLayer.GetDotByDotOrId( b );
        return d1.IsConnectedTo( d2 );