code: public int getSiblingCount(Geometry geometry, GeometryIndex index) {
  		return delegate.getSiblingCount(geometry, toDelegate(index));
  	}
docs: Given a certain index, how many indices of the same type can be found within the given geometry. This count
  includes the given index.<br>
  For example, if the index points to a vertex on a LinearRing within a polygon, then this will return the amount
  of vertices on that LinearRing.
  
  @param geometry The geometry to look into.
  @param index The index to take as example (can be of any type).
  @return Returns the total amount of siblings.