code: private boolean getPresenceOfSulfat(IAtomContainer ac, IAtom atom) {
          List<IAtom> neighbours = ac.getConnectedAtomsList(atom);
          //org.openscience.cdk.interfaces.IAtom[] second = null;
          //IBond bond = null;
          //int counter = 0;
          for (IAtom neighbour : neighbours) {
              if (neighbour.getSymbol().equals("S") && getOxygenCount(ac, neighbour) >= 2
                      && ac.getConnectedBondsCount(neighbour) == 4) {
                  return true;
              }
          }
          return false;
      }
docs: Gets the presenceOfSulfat A-S(O2)-A attribute of the XLogPDescriptor object.
  
  @param  ac    Description of the Parameter
  @param  atom  Description of the Parameter
  @return       The presenceOfSulfat [boolean]