code: public boolean isCachedAtomContainer(IAtomContainer container) {
          if (cachedDescriptorValues == null) return false;
          return (cachedDescriptorValues.get(PREVIOUS_ATOMCONTAINER) == container);
      }
docs: Returns true if the cached IDescriptorResult's are for the given IAtomContainer.
  
  @param container
  @return false, if the cache is for a different IAtomContainer