code: public void clearProps(IAtomContainer mol) {
          mol.removeProperty(MMFF_EDGEMAP_CACHE);
          mol.removeProperty(MMFF_ADJLIST_CACHE);
          for (IBond bond : mol.bonds())
              bond.removeProperty(MMFF_AROM);
      }
docs: Clear all transient properties assigned by this class. Assigned charges
  and atom type names remain set.
  
  @param mol molecule