Neighbour points of current point

Hello!

How to get the neighbour points of the current point in VTK?

I am aware of quering the Cell. which this point belongs to, and than quering the points of these cells, however, due to the existence of elements of next order, also the points which are not right next to this current point, are get this way.

I know VTK has an implicit knowledge of connectivity, but dont know how to use it

Thanks!