code: public static AtomTypeFactory getInstance(InputStream ins, String format, IChemObjectBuilder builder) {
          return new AtomTypeFactory(ins, format, builder);
      }
docs: Method to create a default AtomTypeFactory, using the given InputStream.
  An AtomType of this kind is not cached.
  
  @see #getInstance(String, IChemObjectBuilder)
  @param  ins                    InputStream containing the data
  @param  format                 String representing the possible formats ('xml' and 'txt')
  @param  builder                IChemObjectBuilder used to make IChemObject instances
  @return                        The AtomTypeFactory for the given data file