code: private List<IAtomContainer> toFragments(int[][] verticesList) {
          List<IAtomContainer> fragments = new ArrayList<IAtomContainer>();
          for (int[] vertices : verticesList) {
              fragments.add(toFragment(vertices));
          }
          return fragments;
      }
docs: Utility method for creating the fragments for the fused/isolated sets
  
  @param verticesList 2D array of vertices (rows=n fragments)
  @return the vertices converted to an atom container
  @see #toFragment(int[])
  @see #fusedRingFragments()
  @see #isolatedRingFragments()