code: public static IAtomContainer copyAndSuppressedHydrogens(IAtomContainer org) {
          try {
              return suppressHydrogens(org.clone());
          } catch (CloneNotSupportedException e) {
              throw new IllegalStateException("atom container could not be cloned");
          }
      }
docs: Copy the input container and suppress any explicit hydrogens. Only
  hydrogens that can be represented as a hydrogen count value on the atom
  are suppressed. If a copy is not needed please use {@link
  #suppressHydrogens}.
  
  @param org the container from which to remove hydrogens
  @return a copy of the input with suppressed hydrogens
  @see #suppressHydrogens