code: public boolean isAdjacent(Geometry geometry, GeometryIndex one, GeometryIndex two) {
  		return delegate.isAdjacent(geometry, toDelegate(one), toDelegate(two));
  	}
docs: Given a certain geometry and index (one), check if the the other index (two) is a neighbor.
  
  @param geometry The geometry wherein to search if indices one and two are neighbors.
  @param one One of the indices. Must point to either a vertex or and edge.
  @param two Another one of the indices. Must point to either a vertex or and edge.
  @return true or false.