code: Collection<Point2d[]> getCoordinates(IAtomContainer mol) {
          try {
              // create the library key to lookup an entry, we also store
              // the canonical out ordering
              int n = mol.getAtomCount();
              int[] ordering = new int[n];
              String smiles = cansmi(mol, ordering);
  
              final Collection<Point2d[]> coordSet = templateMap.get(smiles);
              final List<Point2d[]> orderedCoordSet = new ArrayList<>(coordSet.size());
  
              for (Point2d[] coords : coordSet) {
                  Point2d[] orderedCoords = new Point2d[coords.length];
                  for (int i = 0; i < n; i++) {
                      orderedCoords[i] = new Point2d(coords[ordering[i]]);
                  }
                  orderedCoordSet.add(orderedCoords);
              }
              return Collections.unmodifiableList(orderedCoordSet);
          } catch (CDKException e) {
              return Collections.emptyList();
          }
      }
docs: Get all templated coordinates for the provided molecule. The return collection has
  coordinates ordered based on the input.
  
  @param mol molecule (or fragment) to lookup
  @return the coordinates