code: @Override
      public Double[] getMultipliers() {
          Double[] returnArray = new Double[this.atomContainerCount];
          System.arraycopy(this.multipliers, 0, returnArray, 0, this.atomContainerCount);
          return returnArray;
      }
docs: Returns an array of double with the stoichiometric coefficients
  of the products.
  
  @return    The multipliers for the AtomContainer's in this set
  @see       #setMultipliers