code: public boolean postMortem(PostMortem pm) {
          JSONzip that = (JSONzip) pm;
          return this.namehuff.postMortem(that.namehuff)
                  && this.namekeep.postMortem(that.namekeep)
                  && this.stringkeep.postMortem(that.stringkeep)
                  && this.stringhuff.postMortem(that.stringhuff)
                  && this.valuekeep.postMortem(that.valuekeep);
      }
docs: This method is used for testing the implementation of JSONzip. It is not
  suitable for any other purpose. It is used to compare a Compressor and a
  Decompressor, verifying that the data structures that were built during
  zipping and unzipping were the same.
  
  @return true if the structures match.